1956 -999.0 -2.0 -10.0 -16.0 -16.0 -15.0 -18.0 -22.0 -16.0 -14.0 -6.0 -1.0 1957 -1.0 -5.0 -10.0 -10.0 -15.0 -17.0 -18.0 -15.0 -16.0 -11.0 -7.0 -1.0 1958 -1.0 -6.0 -10.0 -13.0 -5.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1959 0.0 -7.0 -9.0 -14.0 -14.0 -15.9 -18.0 -18.0 -23.0 -13.0 -9.0 -2.0 1960 -2.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -17.0 -14.0 -6.0 -2.0 1961 -1.0 -4.2 -9.8 -14.0 -14.0 -16.2 -13.4 -15.8 -14.5 -15.1 -8.0 -4.6 1962 -3.0 -6.0 -11.0 -16.0 -22.0 -18.0 -22.0 -19.0 -17.0 -12.0 -6.0 -3.0 1963 -2.0 -7.0 -13.0 -18.0 -18.0 -14.0 -19.0 -16.0 -16.0 -16.0 -9.0 -4.0 1964 -2.0 -6.0 -12.0 -16.0 -20.0 -15.0 -19.0 -16.0 -23.0 -14.0 -5.0 -2.0 1965 -2.0 -4.0 -11.0 -16.0 -16.0 -21.0 -19.0 -18.0 -22.0 -14.0 -9.0 -1.0 1966 -2.0 -5.0 -8.0 -14.0 -15.0 -19.0 -14.0 -22.0 -19.0 -16.0 -6.0 -2.0 1967 -1.0 -7.0 -10.0 -14.0 -17.0 -15.0 -15.0 -20.0 -16.0 -17.0 -6.0 -2.0 1968 -2.0 -7.0 -11.0 -16.0 -17.0 -15.0 -19.0 -19.0 -19.0 -13.0 -6.0 -3.0 1969 0.0 -5.0 -11.0 -15.0 -20.0 -17.0 -22.0 -26.0 -17.0 -12.0 -8.0 -2.0 1970 -1.0 -6.0 -10.0 -14.0 -14.0 -17.0 -20.0 -19.0 -16.0 -13.0 -6.0 -1.0 1971 0.0 -5.0 -12.0 -14.0 -14.0 -16.0 -19.0 -16.0 -16.0 -12.0 -8.0 -1.0 1972 0.0 -5.0 -10.0 -13.0 -21.0 -13.0 -18.0 -13.0 -19.0 -18.0 -8.0 -2.0 1973 -1.0 -6.0 -12.0 -12.0 -14.0 -13.0 -20.0 -17.0 -14.0 -12.0 -4.0 -1.0 1974 1.0 -6.0 -11.0 -15.0 -16.0 -15.0 -18.0 -14.0 -18.0 -9.0 -6.0 -1.0 1975 -1.0 -4.0 -8.0 -16.0 -13.0 -15.0 -16.0 -21.0 -21.0 -14.0 -4.0 -2.0 1976 -1.0 -5.0 -12.0 -17.0 -999.0 -14.0 -18.0 -22.0 -17.0 -11.0 -6.0 -2.0 1977 -999.0 -999.0 -9.0 -15.0 -15.0 -18.0 -17.0 -17.0 -22.0 -15.0 -8.0 -999.0 1978 -999.0 -999.0 -11.0 -15.0 -16.0 -15.0 -17.0 -21.0 -19.0 -16.0 -5.0 -999.0 1979 -999.0 -999.0 -12.0 -14.0 -16.0 -18.0 -20.0 -19.0 -18.0 -13.0 -8.0 -999.0 1980 -999.0 -999.0 -9.0 -12.0 -16.0 -18.0 -12.0 -16.0 -16.0 -15.0 -5.0 -999.0 1981 -999.0 -999.0 -9.0 -17.0 -18.0 -17.0 -15.0 -13.0 -16.0 -14.0 -7.0 -999.0 1982 -999.0 -999.0 -14.0 -19.0 -14.0 -20.0 -13.0 -26.0 -21.0 -13.0 -7.0 -999.0 1983 -1.0 -4.0 -12.0 -13.0 -13.0 -14.0 -21.0 -18.0 -14.0 -15.0 -9.0 -2.0 1984 -1.0 -5.0 -10.0 -12.0 -13.0 -18.0 -19.0 -15.0 -17.0 -17.0 -9.0 -2.0 1985 -1.0 -6.0 -8.0 -12.0 -19.0 -15.0 -22.0 -18.0 -17.0 -14.0 -7.0 -3.0 1986 -2.0 -2.0 -9.0 -13.0 -15.0 -18.0 -19.0 -17.0 -15.0 -11.0 -7.0 -2.0 1987 -1.0 -5.0 -11.0 -15.0 -19.0 -16.0 -14.0 -23.0 -17.0 -12.0 -7.0 -2.0 1988 -1.0 -5.0 -10.0 -14.0 -11.0 -14.0 -19.0 -17.0 -16.0 -11.0 -8.0 -3.0 1989 -3.0 -7.0 -13.0 -17.0 -19.0 -18.0 -18.0 -15.0 -12.0 -9.0 -10.0 -1.0 1990 -2.0 -6.0 -11.0 -12.0 -15.0 -20.0 -17.0 -18.0 -17.0 -999.0 -7.0 -2.0 1991 -2.0 -4.0 -10.0 -11.0 -16.0 -13.0 -14.0 -15.0 -19.0 -12.0 -6.0 -1.0 1992 -2.0 -4.0 -10.0 -15.0 -18.0 -16.0 -21.0 -16.0 -20.0 -13.0 -8.0 -4.0 1993 -1.0 -4.0 -11.0 -16.0 -20.0 -20.0 -21.0 -20.0 -18.0 -15.0 -8.0 -4.0 1994 -3.0 -6.0 -12.0 -18.0 -19.0 -12.0 -17.0 -21.0 -14.0 -11.0 -7.0 -3.0 1995 -2.0 -6.0 -9.0 -15.0 -19.0 -16.0 -10.0 -15.0 -17.0 -15.0 -7.0 -3.0 1996 -2.0 -5.0 -10.0 -13.0 -19.0 -15.0 -14.0 -13.0 -14.0 -12.0 -5.0 -2.0 1997 -2.0 -5.0 -10.0 -17.0 -16.0 -13.0 -18.0 -19.0 -16.0 -14.0 -7.0 -1.0 1998 -1.0 -6.0 -12.0 -17.0 -17.0 -16.0 -21.0 -15.0 -18.0 -14.0 -6.0 -2.0 1999 -3.0 -5.0 -11.0 -16.0 -19.0 -15.0 -20.0 -18.0 -18.0 -13.0 -8.0 -4.0 2000 -2.0 -5.0 -12.0 -13.0 -19.0 -18.0 -17.0 -15.0 -13.0 -15.0 -5.0 -1.0 2001 0.0 -4.0 -9.0 -14.0 -14.0 -18.0 -15.0 -19.0 -17.0 -15.0 -7.0 -3.0 2002 -1.0 -6.0 -8.0 -11.0 -13.0 -13.0 -15.0 -18.0 -16.0 -12.0 -7.0 -3.0 2003 -1.0 -3.0 -10.0 -14.0 -17.0 -17.0 -21.0 -18.0 -15.0 -13.0 -8.0 -2.0 2004 0.0 -3.0 -9.0 -14.0 -14.0 -17.0 -20.0 -16.0 -18.0 -12.0 -7.0 -1.0 2005 0.0 -5.0 -10.0 -16.0 -17.0 -15.0 -20.0 -18.0 -15.0 -12.0 -7.0 -1.0 2006 -1.0 -7.0 -10.0 -10.0 -22.0 -17.0 -18.0 -15.0 -14.0 -14.0 -6.0 -2.0 2007 -1.0 -4.0 -9.0 -13.0 -12.0 -15.0 -12.0 -15.0 -15.0 -14.0 -6.0 -4.0 2008 -2.0 -6.0 -11.0 -13.0 -14.0 -16.0 -16.0 -19.0 -19.0 -14.0 -6.0 -2.0 2009 -1.0 -3.0 -10.0 -15.0 -12.0 -15.0 -14.0 -17.0 -14.0 -12.0 -7.0 -2.0 2010 -1.0 -4.0 -10.0 -16.0 -17.0 -15.0 -20.0 -21.0 -14.0 -14.0 -9.0 -2.0 2011 0.0 -7.0 -9.0 -13.0 -18.0 -19.0 -15.0 -14.0 -17.0 -15.0 -9.0 -3.0 2012 0.0 -5.0 -8.0 -11.0 -14.0 -16.0 -18.0 -18.0 -17.0 -14.0 -9.0 -2.0 2013 0.0 -5.0 -13.0 -15.0 -16.0 -16.0 -18.0 -17.0 -10.0 -12.0 -5.0 -1.0 2014 -1.0 -4.0 -12.0 -16.0 -15.0 -19.0 -19.0 -19.0 -14.0 -12.0 -4.0 -2.0 2015 -2.0 -5.0 -11.0 -18.0 -20.0 -17.0 -20.0 -18.0 -17.0 -15.0 -7.0 -2.0 2016 -1.0 -4.0 -11.0 -14.0 -15.0 -19.0 -19.0 -15.0 -19.0 -11.0 -2.0 0.0 2017 0.0 -1.0 -7.0 -13.0 -16.0 -21.0 -17.0 -17.0 -18.0 -15.0 -9.0 -4.0 2018 0.0 -4.0 -10.0 -11.0 -14.0 -14.0 -14.0 -16.0 -17.0 -14.0 -8.0 -2.0 2019 -1.0 -4.0 -12.0 -15.0 -18.0 -19.0 -16.0 -15.0 -18.0 -14.0 -6.0 -2.0 2020 -1.0 -5.0 -12.0 -12.0 -16.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 2021 -3.0 -4.0 -9.0 -16.0 -17.0 -19.0 -17.0 -13.0 -14.0 -10.0 -8.0 -3.0 2022 -2.0 -5.0 -9.0 -15.0 -13.0 -15.0 -17.0 -18.0 -16.0 -9.0 -8.0 -3.0 2023 -1.0 -4.0 -11.0 -12.0 -20.0 -17.0 -21.0 -22.0 -14.0 -14.0 -8.0 -3.0