Precipitation annual maximum series (inches) Station ID: 25-5995 Station name: NORFOLK AP State: NE Latitude (decimal degrees): 41.9856 Longitude (decimal degrees): -97.4353 Elevation (feet): 1551 Duration: 1 hour 06/01/1949 1.08 07/08/1950 1.35 05/31/1951 0.81 07/06/1952 1.00 04/24/1953 0.49 05/30/1954 1.00 05/26/1955 0.99 07/04/1956 1.35 05/01/1957 0.93 07/30/1958 0.98 08/01/1959 0.81 06/09/1960 1.11 07/10/1961 1.43 06/29/1962 1.02 08/27/1963 0.90 06/16/1964 1.98 07/19/1965 1.23 08/12/1966 0.81 06/13/1967 1.88 08/09/1968 0.87 06/25/1969 1.67 09/02/1970 1.78 07/10/1971 1.17 06/18/1972 1.74 07/18/1973 1.20 06/05/1974 2.01 07/19/1975 1.33 06/23/1976 0.69 05/27/1977 1.40 05/28/1978 1.02 10/18/1979 1.34 06/14/1980 1.09 07/25/1981 2.47 05/11/1982 0.97 06/17/1983 1.95 07/26/1984 0.84 04/21/1985 0.69 07/24/1986 2.02 07/24/1987 1.00 07/08/1988 0.90 09/03/1989 1.71 06/15/1990 2.00 06/04/1991 2.35 08/07/1992 0.82 06/24/1993 0.94 06/18/1994 2.54 08/22/1995 1.78 06/11/1998 1.62 07/26/1999 1.07 07/11/2000 1.11 08/15/2001 0.59 08/04/2002 1.75 07/05/2003 1.53 05/22/2004 1.06 04/21/2005 0.97 06/16/2006 0.97 08/22/2007 0.83 06/24/2008 0.90 06/15/2009 0.83 08/02/2010 2.02 Duration: 2 hours 06/01/1949 1.81 07/08/1950 2.30 05/31/1951 1.05 07/06/1952 1.25 04/24/1953 0.75 06/20/1954 1.39 05/26/1955 1.04 07/04/1956 1.44 05/01/1957 1.01 07/30/1958 1.38 07/31/1959 0.92 06/09/1960 1.58 07/31/1961 1.67 06/16/1962 1.11 08/27/1963 0.94 06/16/1964 2.31 07/19/1965 2.01 08/12/1966 1.29 06/13/1967 2.03 08/09/1968 1.15 06/25/1969 2.60 09/02/1970 2.71 06/09/1971 1.56 06/18/1972 2.02 07/18/1973 1.50 06/05/1974 3.46 08/30/1975 1.55 06/23/1976 1.37 07/20/1977 1.82 08/14/1978 1.27 10/18/1979 1.45 06/14/1980 1.20 07/25/1981 2.59 08/04/1982 1.16 06/17/1983 2.17 06/17/1984 1.14 04/21/1985 0.95 07/24/1986 2.45 09/14/1987 1.20 07/08/1988 1.40 09/03/1989 1.84 06/15/1990 2.69 06/04/1991 4.05 08/07/1992 1.02 07/08/1993 1.52 06/18/1994 2.99 08/22/1995 2.28 06/11/1998 1.77 08/06/1999 1.44 07/11/2000 1.35 08/15/2001 1.13 08/04/2002 1.98 07/05/2003 1.61 05/22/2004 1.67 04/20/2005 1.08 06/16/2006 1.17 08/22/2007 1.44 06/07/2008 1.09 06/16/2009 1.38 08/02/2010 2.67 Duration: 3 hours 06/01/1949 2.57 07/08/1950 2.40 05/31/1951 1.16 07/06/1952 1.76 09/02/1953 0.87 05/30/1954 1.63 05/26/1955 1.10 07/04/1956 1.47 05/01/1957 1.03 07/29/1958 1.74 05/20/1959 1.05 06/09/1960 1.67 07/31/1961 1.74 06/29/1962 1.14 08/27/1963 0.97 06/16/1964 2.36 07/19/1965 2.25 08/12/1966 1.42 06/13/1967 2.08 08/09/1968 1.18 06/25/1969 3.10 09/02/1970 3.31 06/09/1971 1.59 06/18/1972 2.12 07/18/1973 1.53 06/05/1974 4.45 08/30/1975 1.58 06/23/1976 1.51 05/27/1977 1.94 08/14/1978 1.33 10/18/1979 1.48 06/14/1980 1.24 07/25/1981 2.64 08/04/1982 1.21 06/17/1983 2.23 06/11/1984 1.21 04/21/1985 1.07 07/24/1986 2.50 09/14/1987 1.35 07/08/1988 1.50 09/03/1989 1.88 06/15/1990 2.92 06/04/1991 4.75 08/07/1992 1.08 07/08/1993 1.76 06/18/1994 3.24 08/22/1995 3.08 08/21/1998 2.10 08/06/1999 1.60 06/23/2000 1.76 08/14/2001 1.46 08/04/2002 2.10 07/05/2003 1.64 05/22/2004 2.02 08/10/2005 1.18 06/16/2006 1.25 08/22/2007 1.55 06/07/2008 1.55 06/16/2009 1.50 08/02/2010 3.12 Duration: 6 hours 06/01/1949 3.38 07/08/1950 2.68 04/26/1951 1.19 07/06/1952 2.07 09/02/1953 1.45 06/20/1954 2.50 05/26/1955 1.25 06/25/1956 1.48 09/13/1957 1.32 07/30/1958 2.14 05/20/1959 1.06 06/19/1960 1.69 07/31/1961 2.85 06/16/1962 1.16 08/27/1963 0.98 06/21/1964 2.53 07/19/1965 2.53 08/12/1966 1.96 06/04/1967 2.28 10/15/1968 1.46 06/24/1969 4.23 09/02/1970 3.88 06/09/1971 1.61 06/18/1972 2.14 05/26/1973 2.18 06/05/1974 4.89 06/18/1975 1.62 06/23/1976 1.98 05/27/1977 2.30 07/21/1978 1.75 10/18/1979 1.49 06/14/1980 1.25 07/25/1981 2.67 10/08/1982 1.25 06/17/1983 2.27 06/11/1984 1.52 06/26/1985 1.26 07/24/1986 2.52 09/14/1987 1.45 05/20/1988 1.87 09/03/1989 2.05 06/15/1990 3.29 06/04/1991 5.35 06/15/1992 1.52 06/23/1993 2.14 06/18/1994 3.31 08/22/1995 3.92 08/20/1998 2.69 08/06/1999 1.76 06/23/2000 1.98 08/14/2001 2.76 08/04/2002 2.37 07/05/2003 1.66 05/22/2004 2.04 08/10/2005 1.43 08/02/2006 1.56 08/22/2007 2.61 06/07/2008 1.65 09/03/2009 1.76 08/02/2010 3.15 Duration: 12 hours 06/01/1949 3.41 07/08/1950 2.71 04/26/1951 1.20 07/06/1952 3.39 06/07/1953 1.67 06/20/1954 2.58 06/23/1955 1.46 06/25/1956 1.50 09/13/1957 1.82 07/29/1958 2.91 05/05/1959 1.40 05/05/1960 1.84 07/31/1961 2.88 06/16/1962 1.28 08/27/1963 0.99 06/21/1964 2.56 07/19/1965 2.56 08/12/1966 2.46 06/04/1967 2.71 10/15/1968 2.32 06/24/1969 4.27 09/02/1970 3.92 06/09/1971 2.17 07/31/1972 2.25 05/26/1973 2.96 06/05/1974 5.46 07/18/1975 1.75 06/23/1976 2.04 05/27/1977 2.61 08/14/1978 2.88 05/01/1979 1.65 08/15/1980 1.37 07/25/1981 2.70 10/08/1982 1.89 06/17/1983 2.52 06/11/1984 1.54 06/26/1985 1.91 07/24/1986 2.55 03/22/1987 1.70 05/20/1988 2.24 09/03/1989 2.07 06/15/1990 3.32 06/04/1991 5.42 06/15/1992 1.54 06/23/1993 2.16 06/18/1994 3.34 08/22/1995 5.06 08/20/1998 3.72 05/31/1999 1.98 11/05/2000 2.17 08/14/2001 3.33 08/04/2002 2.39 09/10/2003 2.17 05/22/2004 2.06 05/11/2005 1.72 08/01/2006 2.05 08/22/2007 3.14 06/07/2008 1.67 09/03/2009 1.87 08/02/2010 3.30 Duration: 1 day 09/24/1948 3.07 06/01/1949 3.05 07/08/1950 2.42 08/14/1951 2.11 07/06/1952 3.09 06/07/1953 1.71 06/20/1954 2.30 05/26/1955 1.46 07/04/1956 1.34 09/13/1957 2.21 07/30/1958 2.69 05/20/1959 1.57 06/09/1960 2.13 07/31/1961 2.57 03/24/1962 1.14 08/27/1963 1.14 06/16/1964 2.52 07/19/1965 2.32 06/08/1966 2.31 06/13/1967 2.42 10/16/1968 2.49 06/25/1969 3.81 09/02/1970 3.50 02/18/1971 2.15 08/01/1972 2.21 05/26/1973 3.68 06/05/1974 4.92 06/08/1975 1.79 06/23/1976 2.16 05/27/1977 2.45 08/14/1978 2.58 10/30/1979 1.86 08/16/1980 1.33 07/25/1981 2.51 05/25/1982 2.04 06/17/1983 2.43 02/18/1984 1.70 06/26/1985 2.93 07/24/1986 2.28 03/23/1987 2.46 05/20/1988 2.62 09/03/1989 1.85 06/15/1990 3.54 06/04/1991 4.84 10/07/1992 1.98 07/08/1993 2.91 06/18/1994 2.98 08/22/1995 4.52 06/29/1997 2.39 08/21/1998 3.46 04/14/1999 1.88 07/11/2000 2.46 08/15/2001 3.57 08/04/2002 2.22 05/04/2003 2.72 05/22/2004 3.03 10/04/2005 1.98 09/10/2006 2.29 08/22/2007 3.87 05/27/2008 2.25 09/03/2009 2.45 08/02/2010 2.95 Duration: 2 days 09/23/1948 3.31 06/01/1949 3.28 07/08/1950 2.64 08/14/1951 2.29 07/06/1952 3.33 06/07/1953 1.86 06/20/1954 2.48 05/25/1955 2.03 06/05/1956 1.56 09/13/1957 2.38 07/29/1958 2.90 05/04/1959 2.75 06/08/1960 2.38 07/30/1961 2.77 05/20/1962 1.32 06/14/1963 1.30 06/21/1964 3.50 05/24/1965 2.99 06/08/1966 2.56 06/13/1967 3.67 10/16/1968 4.30 06/24/1969 4.60 09/02/1970 3.77 02/18/1971 2.89 07/31/1972 2.44 05/26/1973 4.66 06/05/1974 5.30 06/18/1975 2.62 05/21/1976 2.56 05/26/1977 2.82 07/20/1978 3.29 10/29/1979 2.56 08/15/1980 1.57 07/24/1981 2.81 05/24/1982 2.74 06/17/1983 2.62 06/16/1984 1.96 06/25/1985 3.16 07/24/1986 2.46 03/22/1987 3.37 05/20/1988 3.21 07/14/1989 2.02 06/15/1990 4.91 06/04/1991 5.21 10/07/1992 2.88 07/07/1993 3.18 06/18/1994 3.21 08/22/1995 5.37 06/29/1997 2.57 08/20/1998 3.73 04/13/1999 2.33 07/05/2000 2.71 08/14/2001 3.85 08/03/2002 2.94 09/10/2003 3.07 05/21/2004 3.29 04/20/2005 2.35 09/09/2006 2.55 08/22/2007 4.64 05/27/2008 2.42 06/15/2009 2.78 06/11/2010 4.76 Duration: 3 days 09/23/1948 3.34 06/01/1949 3.39 07/16/1950 2.75 08/12/1951 3.24 07/05/1952 3.87 04/28/1953 1.94 06/18/1954 2.59 05/25/1955 2.14 06/04/1956 1.64 09/13/1957 2.47 07/29/1958 3.02 05/04/1959 2.87 06/09/1960 2.93 07/30/1961 2.88 06/05/1962 1.45 06/24/1963 1.52 06/14/1964 4.09 05/24/1965 3.11 06/08/1966 2.68 06/13/1967 3.82 10/15/1968 4.48 06/23/1969 4.78 09/02/1970 3.88 02/17/1971 3.01 07/31/1972 2.60 05/26/1973 4.91 06/05/1974 5.51 06/18/1975 3.13 05/21/1976 2.66 05/19/1977 3.19 07/20/1978 3.43 10/29/1979 2.66 06/12/1980 1.82 07/25/1981 3.16 05/24/1982 2.85 06/17/1983 2.84 02/16/1984 2.05 06/25/1985 3.28 07/24/1986 2.48 03/22/1987 3.81 05/20/1988 3.44 07/15/1989 3.20 06/13/1990 5.52 06/04/1991 5.42 10/06/1992 3.02 07/08/1993 3.70 06/18/1994 3.31 08/22/1995 5.58 06/29/1997 2.61 08/20/1998 3.87 04/13/1999 2.54 07/04/2000 2.87 08/14/2001 4.00 08/03/2002 3.06 09/09/2003 3.66 05/21/2004 3.42 04/20/2005 2.72 09/09/2006 2.65 08/21/2007 4.83 05/27/2008 2.94 06/15/2009 3.35 06/10/2010 5.00 Duration: 4 days 09/23/1948 3.37 05/29/1949 3.60 07/15/1950 3.63 08/11/1951 3.27 07/05/1952 3.91 04/28/1953 2.12 05/30/1954 2.74 05/25/1955 2.16 06/03/1956 1.70 09/13/1957 2.49 07/27/1958 3.16 05/03/1959 2.90 06/08/1960 3.01 07/30/1961 2.91 06/03/1962 1.83 06/24/1963 1.53 06/14/1964 4.13 05/22/1965 4.04 06/05/1966 3.13 06/11/1967 4.49 10/15/1968 4.52 06/22/1969 6.85 09/02/1970 3.92 06/06/1971 3.40 07/17/1972 3.72 05/26/1973 4.97 06/05/1974 6.28 06/18/1975 4.14 05/21/1976 2.69 05/19/1977 3.52 07/20/1978 3.46 10/29/1979 2.69 06/12/1980 1.97 07/24/1981 3.34 05/24/1982 2.88 06/17/1983 2.92 02/15/1984 2.32 06/23/1985 3.37 07/24/1986 2.67 03/22/1987 3.85 05/20/1988 3.47 07/14/1989 3.50 06/13/1990 6.44 06/01/1991 5.71 10/06/1992 3.05 07/07/1993 3.75 07/12/1994 3.41 08/22/1995 5.63 06/29/1997 2.64 07/03/1998 4.35 07/16/1999 2.56 07/03/2000 2.97 08/14/2001 4.04 08/03/2002 3.09 09/09/2003 3.70 05/21/2004 3.47 04/18/2005 3.45 08/10/2006 2.81 08/20/2007 5.08 05/24/2008 3.29 06/14/2009 3.51 06/10/2010 5.58 Duration: 7 days 09/20/1948 3.56 05/26/1949 4.17 07/15/1950 4.37 08/14/1951 4.03 07/06/1952 4.06 04/24/1953 2.97 05/27/1954 3.03 06/17/1955 2.37 06/29/1956 1.96 09/09/1957 3.54 07/24/1958 4.15 05/03/1959 3.54 06/09/1960 3.29 07/26/1961 4.46 05/16/1962 2.38 08/27/1963 2.47 06/16/1964 5.53 05/21/1965 4.17 06/03/1966 4.13 06/09/1967 6.42 10/15/1968 4.57 06/22/1969 6.92 09/02/1970 3.96 06/04/1971 3.93 04/26/1972 3.95 05/23/1973 5.08 06/05/1974 6.96 06/18/1975 4.28 05/21/1976 2.92 05/21/1977 5.28 07/17/1978 3.50 03/17/1979 3.29 06/12/1980 2.85 07/21/1981 3.73 05/20/1982 4.17 06/11/1983 4.81 06/11/1984 3.98 04/20/1985 4.63 07/24/1986 3.19 03/17/1987 5.41 05/18/1988 3.51 09/03/1989 3.58 06/12/1990 6.53 05/29/1991 7.15 10/06/1992 3.08 07/02/1993 4.49 07/01/1994 4.78 08/18/1995 5.90 06/29/1997 2.90 07/02/1998 4.87 04/08/1999 3.22 07/05/2000 4.85 05/01/2001 4.50 08/03/2002 4.23 09/09/2003 3.74 05/16/2004 3.96 04/18/2005 3.77 09/09/2006 3.95 08/20/2007 5.13 05/23/2008 5.14 06/11/2009 4.25 06/07/2010 6.76 Duration: 10 days 09/20/1948 3.60 05/23/1949 4.21 07/14/1950 5.00 08/11/1951 5.18 07/05/1952 5.09 04/24/1953 3.50 05/26/1954 3.99 06/16/1955 3.08 06/25/1956 3.41 09/09/1957 3.73 07/27/1958 4.36 05/02/1959 3.87 06/08/1960 3.47 07/26/1961 4.50 05/13/1962 2.71 08/27/1963 2.66 06/14/1964 7.23 05/17/1965 4.40 06/03/1966 4.22 06/04/1967 9.52 10/08/1968 4.62 06/22/1969 6.99 09/02/1970 4.23 06/04/1971 4.64 04/26/1972 4.28 05/26/1973 5.15 06/02/1974 7.09 06/14/1975 4.76 05/21/1976 2.95 05/18/1977 6.32 07/14/1978 3.73 05/01/1979 3.77 06/12/1980 2.88 07/24/1981 3.86 05/17/1982 4.58 06/11/1983 5.01 06/11/1984 4.23 04/21/1985 5.06 07/24/1986 3.34 03/15/1987 6.84 07/07/1988 4.07 09/03/1989 3.62 06/12/1990 7.07 05/28/1991 7.41 08/04/1992 3.42 07/08/1993 6.02 07/03/1994 6.29 08/18/1995 5.96 06/29/1997 3.86 06/08/1998 5.29 04/05/1999 4.95 07/03/2000 5.07 05/01/2001 4.54 08/03/2002 4.27 05/04/2003 4.30 05/13/2004 4.46 04/13/2005 3.81 08/02/2006 4.02 10/07/2007 5.50 05/21/2008 5.82 06/12/2009 4.83 06/05/2010 7.35 Duration: 20 days 07/25/1948 5.64 05/16/1949 7.04 07/08/1950 8.70 08/08/1951 5.90 06/26/1952 6.57 04/24/1953 4.58 05/26/1954 4.86 06/04/1955 3.97 06/25/1956 5.08 08/26/1957 5.31 07/17/1958 7.03 05/02/1959 5.78 06/08/1960 6.01 05/30/1961 5.36 05/18/1962 4.64 06/14/1963 3.41 06/14/1964 7.98 05/07/1965 6.42 06/05/1966 4.90 05/27/1967 12.84 10/05/1968 4.62 06/10/1969 8.09 09/02/1970 7.39 05/30/1971 5.27 07/16/1972 6.67 05/26/1973 6.06 05/21/1974 9.07 06/03/1975 7.47 05/11/1976 3.53 05/08/1977 7.39 07/05/1978 4.41 10/18/1979 4.84 06/06/1980 3.72 07/25/1981 5.88 05/11/1982 7.11 06/12/1983 7.27 04/02/1984 5.77 04/19/1985 5.41 06/13/1986 4.93 03/14/1987 7.27 06/30/1988 5.20 08/20/1989 4.06 06/02/1990 7.61 05/16/1991 11.94 07/25/1992 4.72 06/28/1993 8.13 06/18/1994 9.06 08/18/1995 6.63 06/19/1997 4.94 06/03/1998 7.03 05/30/1999 5.19 06/23/2000 7.93 04/20/2001 5.91 07/21/2002 4.73 04/24/2003 5.52 05/10/2004 5.41 04/10/2005 4.74 07/31/2006 6.22 09/29/2007 8.17 05/22/2008 8.13 06/04/2009 5.92 06/03/2010 10.47 Duration: 30 days 07/16/1948 6.71 05/16/1949 8.79 06/27/1950 9.13 08/08/1951 6.53 06/16/1952 7.40 04/24/1953 5.26 05/23/1954 7.61 05/26/1955 6.52 06/20/1956 5.52 08/22/1957 6.24 07/02/1958 8.43 05/02/1959 7.50 06/09/1960 7.17 07/10/1961 6.48 05/18/1962 6.07 05/31/1963 4.73 06/14/1964 9.06 05/07/1965 7.00 05/29/1966 5.98 05/26/1967 14.33 09/18/1968 4.84 06/22/1969 10.00 09/02/1970 8.13 06/06/1971 6.57 04/26/1972 7.33 05/23/1973 6.37 05/16/1974 9.45 05/23/1975 8.41 04/23/1976 4.20 05/19/1977 9.23 07/17/1978 7.04 04/19/1979 5.81 08/03/1980 4.85 07/21/1981 6.45 05/05/1982 7.75 06/05/1983 7.32 04/02/1984 7.50 04/19/1985 7.32 06/13/1986 5.71 03/15/1987 7.88 07/07/1988 5.82 06/21/1989 5.18 06/12/1990 8.68 05/16/1991 12.17 07/28/1992 6.26 06/18/1993 11.23 06/18/1994 12.74 08/22/1995 9.97 06/11/1997 5.28 06/07/1998 11.24 05/30/1999 6.28 06/12/2000 9.01 04/10/2001 6.97 08/03/2002 5.63 04/29/2003 6.11 05/21/2004 6.68 04/18/2005 6.54 07/31/2006 6.40 09/24/2007 8.50 05/10/2008 9.33 06/06/2009 6.21 06/07/2010 12.06 Duration: 45 days 07/08/1948 7.46 05/20/1949 11.06 07/04/1950 13.08 08/08/1951 8.12 06/26/1952 8.47 04/24/1953 7.83 05/16/1954 7.74 05/25/1955 7.64 06/04/1956 7.26 08/08/1957 7.12 06/22/1958 10.07 04/17/1959 8.88 05/03/1960 9.32 05/04/1961 7.42 05/16/1962 8.16 05/27/1963 6.22 06/10/1964 9.31 08/17/1965 9.38 05/10/1966 6.93 05/26/1967 14.47 09/03/1968 6.95 06/10/1969 11.24 09/02/1970 10.04 06/04/1971 9.44 06/18/1972 10.22 04/15/1973 7.03 04/26/1974 10.92 06/08/1975 9.86 05/11/1976 5.99 05/17/1977 11.69 07/05/1978 7.95 03/18/1979 6.90 07/19/1980 5.55 06/21/1981 7.52 05/05/1982 9.03 06/13/1983 9.32 03/26/1984 8.94 04/21/1985 8.51 06/13/1986 8.38 02/27/1987 8.14 06/30/1988 6.92 06/17/1989 5.58 06/14/1990 11.06 04/26/1991 14.32 07/25/1992 8.61 06/13/1993 14.27 06/01/1994 13.54 08/22/1995 12.72 05/23/1997 7.32 05/23/1998 12.39 05/02/1999 8.45 05/29/2000 9.59 03/23/2001 8.12 08/03/2002 6.80 04/24/2003 7.32 05/21/2004 9.59 04/18/2005 8.08 08/02/2006 9.67 09/09/2007 10.32 04/25/2008 11.51 07/27/2009 7.00 05/30/2010 13.29 Duration: 60 days 06/16/1948 10.76 05/05/1949 11.92 06/17/1950 14.32 06/22/1951 10.76 05/16/1952 11.74 04/09/1953 8.17 04/26/1954 9.29 05/25/1955 9.24 05/20/1956 8.04 08/26/1957 7.78 06/08/1958 11.97 05/02/1959 9.95 05/03/1960 12.23 06/05/1961 9.79 05/16/1962 10.67 06/14/1963 8.21 04/25/1964 11.82 05/21/1965 11.10 05/29/1966 8.04 05/27/1967 14.92 08/29/1968 7.71 06/10/1969 12.27 08/14/1970 10.72 05/30/1971 10.39 04/26/1972 11.06 05/23/1973 10.12 04/11/1974 11.45 05/25/1975 11.53 03/28/1976 6.72 05/02/1977 13.65 06/21/1978 8.81 03/17/1979 9.20 06/06/1980 5.92 06/26/1981 8.78 05/11/1982 10.55 05/01/1983 10.10 04/21/1984 11.93 04/19/1985 9.31 06/13/1986 10.53 02/13/1987 8.47 05/18/1988 9.80 07/14/1989 8.15 06/12/1990 13.55 04/11/1991 15.98 06/15/1992 10.57 05/30/1993 15.62 06/05/1994 16.34 08/18/1995 13.07 05/12/1997 8.32 05/11/1998 14.66 04/05/1999 10.92 05/17/2000 11.61 04/06/2001 9.56 07/21/2002 7.30 04/29/2003 8.71 05/09/2004 11.86 04/10/2005 10.40 07/31/2006 11.56 08/20/2007 15.67 05/02/2008 13.12 07/14/2009 7.79 06/05/2010 17.39