1956 -999.0 -999.0 -6.3 -10.5 -11.3 -10.4 -13.4 -17.4 -11.8 -9.3 -2.3 2.4 1957 1.8 -1.5 -5.8 -6.1 -11.0 -12.2 -13.5 -11.3 -11.7 -7.2 -2.7 0.9 1958 1.7 -0.1 -3.7 -8.4 -8.4 -17.3 -12.5 -16.1 -17.6 -8.9 -4.2 -0.8 1959 2.1 -2.7 -5.9 -9.5 -10.4 -11.3 -14.0 -13.7 -18.6 -8.3 -5.2 0.9 1960 1.4 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -12.9 -10.1 -3.4 0.9 1961 1.0 -0.8 -6.2 -10.1 -9.9 -12.2 -10.6 -11.8 -10.6 -10.1 -3.8 -0.6 1962 0.5 -0.9 -6.4 -11.9 -17.4 -14.3 -17.2 -14.6 -12.7 -9.1 -2.5 0.0 1963 1.5 -2.7 -8.7 -14.8 -14.6 -11.3 -14.7 -12.7 -11.5 -12.5 -5.5 -0.2 1964 1.1 -2.3 -7.9 -13.1 -15.7 -11.5 -14.4 -12.2 -17.9 -10.3 -2.8 0.0 1965 1.3 -0.6 -7.5 -11.5 -12.0 -17.3 -15.0 -14.4 -20.6 -9.7 -6.3 0.7 1966 -0.8 -1.0 -4.1 -10.4 -11.4 -14.6 -10.4 -17.4 -14.6 -10.9 -2.8 0.5 1967 1.8 -2.9 -6.8 -10.4 -13.0 -10.6 -10.3 -15.3 -11.3 -11.9 -3.5 -0.1 1968 1.4 -2.4 -6.9 -12.0 -12.0 -10.4 -14.6 -14.3 -15.1 -9.6 -3.1 0.4 1969 2.9 -1.6 -7.3 -11.1 -9.0 -12.6 -15.7 -21.4 -13.5 -9.4 -4.3 0.3 1970 0.9 -2.1 -6.5 -10.3 -9.6 -12.3 -14.7 -15.4 -13.0 -9.4 -3.3 0.5 1971 1.5 -2.2 -7.2 -9.6 -9.3 -11.1 -14.4 -12.2 -12.1 -8.4 -5.2 0.5 1972 2.2 -1.1 -6.0 -9.8 -16.0 -9.1 -13.4 -9.4 -14.7 -12.8 -4.8 0.5 1973 0.8 -2.6 -8.4 -8.4 -10.0 -10.0 -15.4 -12.9 -11.1 -9.4 -2.2 -0.1 1974 1.8 -2.9 -7.6 -11.4 -12.2 -10.8 -13.5 -10.6 -14.2 -5.8 -2.5 2.3 1975 1.3 -2.2 -4.9 -13.4 -9.5 -10.8 -11.2 -16.8 -17.3 -10.6 -2.4 0.5 1976 0.9 -1.5 -8.6 -13.4 -14.6 -10.2 -13.9 -16.6 -13.0 -8.0 -3.1 1.0 1977 1.7 -1.5 -5.7 -11.3 -10.8 -14.2 -13.4 -12.8 -18.7 -11.8 -4.5 -0.2 1978 0.6 -1.3 -6.8 -11.0 -11.5 -10.7 -12.2 -16.3 -14.5 -11.4 -3.1 0.2 1979 0.6 -2.9 -7.7 -9.2 -11.8 -13.1 -15.4 -13.5 -14.2 -8.9 -3.9 0.8 1980 2.2 0.9 -5.0 -8.3 -11.4 -12.8 -7.6 -12.0 -11.6 -11.3 -2.4 0.5 1981 0.5 -2.5 -5.8 -12.2 -13.8 -11.7 -11.2 -8.1 -11.8 -9.0 -4.7 0.1 1982 0.7 -1.9 -9.0 -13.8 -10.9 -15.6 -10.0 -21.8 -16.8 -9.7 -3.0 2.1 1983 2.0 -0.8 -7.2 -9.4 -9.7 -10.6 -16.9 -13.1 -9.8 -11.1 -5.4 0.5 1984 1.1 -1.9 -5.9 -9.5 -9.2 -14.1 -14.1 -10.7 -13.4 -12.8 -5.0 1.3 1985 1.6 -3.0 -5.2 -8.3 -15.5 -11.2 -17.2 -13.7 -13.1 -10.4 -3.7 -0.4 1986 0.8 0.8 -6.1 -10.0 -11.1 -13.8 -14.6 -12.9 -11.7 -8.3 -3.8 0.7 1987 1.6 -1.6 -7.3 -10.8 -15.3 -11.4 -10.9 -18.8 -13.5 -8.6 -3.2 0.5 1988 1.5 -2.3 -6.9 -11.0 -8.1 -10.4 -15.2 -13.3 -12.0 -7.6 -4.6 0.6 1989 0.2 -3.4 -8.9 -12.6 -14.8 -13.3 -13.9 -11.3 -8.4 -6.3 -5.6 0.9 1990 1.3 -2.4 -8.1 -8.3 -10.7 -16.2 -11.8 -13.9 -14.1 -999.0 -3.4 0.4 1991 0.4 -1.3 -6.5 -7.5 -13.4 -8.9 -10.4 -11.0 -14.9 -9.4 -3.6 1.1 1992 1.3 -1.5 -6.4 -12.2 -14.5 -12.2 -16.2 -11.7 -16.1 -10.0 -4.3 -0.3 1993 1.9 -0.5 -7.6 -11.3 -16.2 -16.1 -16.1 -16.0 -14.3 -11.8 -4.2 -0.6 1994 0.5 -2.1 -8.1 -13.9 -14.6 -9.0 -12.8 -17.4 -11.2 -8.7 -4.0 -0.1 1995 0.1 -3.4 -7.5 -12.7 -16.0 -13.0 -6.9 -11.4 -13.5 -11.1 -3.4 -0.2 1996 0.5 -2.0 -6.5 -9.5 -14.8 -11.3 -10.6 -9.4 -11.2 -9.1 -2.4 0.9 1997 1.2 -2.0 -6.8 -13.7 -12.4 -8.9 -14.2 -15.0 -12.5 -10.5 -3.6 1.3 1998 1.0 -1.7 -8.9 -12.4 -12.2 -13.2 -17.1 -12.1 -15.9 -12.2 -4.7 0.1 1999 -3.4 -2.7 -7.4 -12.9 -14.6 -11.0 -15.8 -13.8 -14.7 -9.5 -5.1 -1.6 2000 0.0 -1.9 -7.9 -10.3 -15.2 -13.5 -12.5 -11.3 -9.5 -12.7 -3.1 0.4 2001 2.3 -2.2 -5.7 -10.1 -10.3 -13.5 -10.0 -15.5 -12.8 -10.8 -4.3 0.0 2002 1.3 -3.3 -5.2 -7.9 -8.8 -9.9 -10.7 -14.3 -12.7 -9.0 -2.8 -0.6 2003 1.1 -0.7 -6.0 -10.3 -13.1 -13.4 -15.8 -14.6 -11.4 -9.8 -3.4 0.3 2004 1.7 0.1 -6.7 -10.7 -10.8 -12.9 -15.2 -11.9 -14.0 -8.5 -3.4 1.8 2005 1.5 -2.1 -6.8 -12.1 -13.4 -11.3 -15.4 -14.4 -11.6 -9.0 -3.9 1.8 2006 0.9 -2.6 -6.5 -6.7 -17.8 -12.8 -13.6 -11.8 -13.4 -10.5 -3.5 0.5 2007 1.0 -1.5 -5.2 -9.1 -7.7 -10.7 -8.5 -11.2 -11.1 -9.9 -3.1 0.2 2008 0.6 -3.4 -7.8 -9.1 -10.5 -12.6 -11.9 -14.9 -15.1 -11.4 -3.4 0.9 2009 1.1 -0.9 -6.8 -12.0 -8.9 -10.6 -9.5 -13.4 -9.9 -9.1 -3.9 1.5 2010 2.2 -1.8 -7.7 -13.1 -13.1 -11.6 -16.6 -16.4 -11.0 -9.8 -4.8 0.8 2011 2.2 -4.5 -6.1 -9.0 -14.2 -14.6 -10.0 -10.9 -12.6 -10.8 -3.3 0.3 2012 0.4 -2.8 -7.4 -10.7 -14.1 -11.6 -17.4 -14.7 -13.4 -8.2 -3.3 1.3 2013 1.5 -2.2 -9.5 -12.2 -12.8 -11.5 -14.0 -14.0 -7.8 -9.4 -3.1 -2.9 2014 1.4 -1.5 -8.5 -12.7 -10.9 -15.3 -14.6 -14.8 -10.4 -9.0 -2.8 0.1 2015 0.9 1.4 -7.0 -15.0 -16.0 -13.1 -15.9 -13.9 -13.1 -11.6 -3.9 -5.5 2016 0.4 -3.5 -8.8 -12.0 -10.4 -15.2 -15.5 -11.1 -15.3 -9.0 -2.4 0.1 2017 1.6 -1.1 -6.9 -11.1 -11.7 -17.3 -13.3 -13.4 -14.6 -11.2 -2.2 0.2 2018 1.3 -2.2 -8.5 -8.1 -12.3 -12.1 -10.2 -13.6 -15.3 -10.2 -3.1 0.6 2019 1.2 -1.2 -8.0 -10.8 -14.3 -14.3 -11.9 -11.3 -14.1 -10.1 -2.9 1.5 2020 2.3 -1.8 -8.7 -7.7 -11.8 -999.0 -12.6 -12.5 -10.8 -9.2 -3.7 -1.0 2021 0.7 -1.5 -6.5 -12.6 -13.9 -14.7 -12.9 -9.7 -11.4 -7.1 -5.5 0.3 2022 0.1 -2.1 -6.4 -12.2 -10.1 -11.3 -13.1 -14.6 -12.0 -7.1 -4.1 -0.1 2023 0.5 -1.5 -6.5 -8.5 -15.7 -12.9 -15.6 -17.7 -9.6 -10.7 -4.6 0.1