1958 -30.0 -45.0 -58.0 -67.0 -65.0 -70.0 -68.0 -73.0 -68.0 -60.0 -43.0 -32.0 1959 -34.0 -44.0 -55.0 -64.0 -67.0 -68.0 -70.0 -72.0 -71.0 -59.0 -44.0 -30.0 1960 -34.0 -44.0 -64.0 -69.0 -69.0 -71.0 -69.0 -72.0 -67.0 -59.0 -43.0 -31.0 1961 -32.5 -43.7 -60.3 -67.8 -67.6 -62.5 -66.5 -70.2 -65.5 -57.3 -44.3 -32.4 1962 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1963 -999.0 -45.0 -61.0 -66.0 -68.0 -67.0 -66.0 -67.0 -60.0 -61.0 -45.0 -32.0 1964 -31.0 -46.0 -63.0 -72.0 -71.0 -64.0 -69.0 -65.0 -72.0 -59.0 -42.0 -30.0 1965 -32.0 -44.0 -62.0 -69.0 -66.0 -68.0 -71.0 -68.0 -68.0 -58.0 -44.0 -31.0 1966 -34.0 -42.0 -55.0 -68.0 -69.0 -71.0 -70.0 -73.0 -70.0 -58.0 -40.0 -30.0 1967 -30.0 -46.0 -56.0 -69.0 -70.0 -69.0 -70.0 -75.0 -66.0 -58.0 -42.0 -30.0 1968 -31.0 -44.0 -59.0 -64.0 -66.0 -65.0 -72.0 -72.0 -73.0 -55.0 -41.0 -32.0 1969 -30.0 -42.0 -60.0 -65.0 -69.0 -66.0 -72.0 -73.0 -72.0 -58.0 -44.0 -30.0 1970 -31.0 -44.0 -57.0 -67.0 -69.0 -66.0 -70.0 -73.0 -67.0 -57.0 -44.0 -30.0 1971 -29.0 -42.0 -60.0 -67.0 -66.0 -68.0 -72.0 -69.0 -66.0 -58.0 -45.0 -29.0 1972 -30.0 -45.0 -59.0 -66.0 -67.0 -68.0 -70.0 -64.0 -64.0 -57.0 -42.0 -31.0 1973 -32.0 -45.0 -60.0 -62.0 -66.0 -67.0 -71.0 -74.0 -65.0 -57.0 -40.0 -31.0 1974 -27.0 -45.0 -63.0 -71.0 -69.0 -65.0 -68.0 -70.0 -71.0 -56.0 -41.0 -29.0 1975 -29.0 -45.0 -57.0 -66.0 -64.0 -68.0 -72.0 -75.0 -72.0 -58.0 -41.0 -30.0 1976 -29.0 -43.0 -60.0 -68.0 -72.0 -67.0 -65.0 -68.0 -71.0 -60.0 -42.0 -26.0 1977 -27.0 -43.0 -59.0 -69.0 -65.0 -66.0 -66.0 -69.0 -73.0 -60.0 -45.0 -30.0 1978 -32.0 -999.0 -60.0 -67.0 -67.0 -66.0 -65.0 -75.0 -65.0 -58.0 -40.0 -999.0 1979 -999.0 -999.0 -60.0 -64.0 -71.0 -71.0 -74.0 -70.0 -69.0 -61.0 -43.0 -999.0 1980 -999.0 -999.0 -54.0 -63.0 -67.0 -62.0 -66.0 -63.0 -64.0 -58.0 -39.0 -999.0 1981 -999.0 -999.0 -58.0 -68.0 -71.0 -68.0 -65.0 -63.0 -64.0 -59.0 -42.0 -999.0 1982 -999.0 -999.0 -64.0 -999.0 -65.0 -70.0 -65.0 -74.0 -73.0 -60.0 -40.0 -999.0 1983 -29.0 -44.0 -59.0 -65.0 -62.0 -64.0 -76.0 -70.0 -63.0 -61.0 -47.0 -33.0 1984 -31.0 -47.0 -58.0 -65.0 -63.0 -72.0 -68.0 -70.0 -65.0 -58.0 -40.0 -26.0 1985 -28.0 -45.0 -60.0 -64.0 -70.0 -69.0 -72.0 -69.0 -68.0 -58.0 -42.0 -28.0 1986 -27.0 -38.0 -59.0 -68.0 -68.0 -72.0 -69.0 -71.0 -68.0 -58.0 -42.0 -30.0 1987 -29.0 -44.0 -58.0 -66.0 -69.0 -62.0 -68.0 -78.0 -70.0 -58.0 -45.0 -30.0 1988 -29.0 -44.0 -58.0 -67.0 -65.0 -66.0 -72.0 -69.0 -68.0 -55.0 -41.0 -28.0 1989 -28.0 -44.0 -57.0 -65.0 -71.0 -71.0 -70.0 -67.0 -63.0 -56.0 -44.0 -29.0 1990 -30.0 -44.0 -60.0 -63.0 -69.0 -68.0 -68.0 -72.0 -68.0 -58.0 -42.0 -26.0 1991 -30.0 -41.0 -58.0 -64.0 -70.0 -64.0 -61.0 -69.0 -70.0 -60.0 -44.0 -30.0 1992 -32.0 -41.0 -58.0 -66.0 -67.0 -64.0 -69.0 -65.0 -70.0 -60.0 -43.0 -32.0 1993 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1994 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1995 -31.0 -43.0 -58.0 -67.0 -71.0 -69.0 -59.0 -69.0 -70.0 -59.0 -40.0 -28.0 1996 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 1997 -28.0 -42.0 -59.0 -66.0 -70.0 -65.0 -73.0 -73.0 -67.0 -59.0 -38.0 -999.0 1998 -29.0 -42.0 -60.0 -69.0 -66.0 -68.0 -68.0 -67.0 -72.0 -61.0 -44.0 -29.0 1999 -27.0 -42.0 -58.0 -72.0 -72.0 -67.0 -72.0 -70.0 -70.0 -59.0 -41.0 -31.0 2000 -29.0 -44.0 -61.0 -66.0 -69.0 -61.0 -65.0 -66.0 -67.0 -61.0 -38.0 -23.0 2001 -24.0 -40.0 -58.0 -64.0 -64.0 -67.0 -67.0 -69.0 -66.0 -55.0 -37.0 -26.0 2002 -25.0 -44.0 -57.0 -63.0 -61.0 -67.0 -66.0 -72.0 -69.0 -55.0 -41.0 -28.0 2003 -28.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 2004 -999.0 -999.0 -58.0 -63.0 -65.0 -67.0 -71.0 -63.0 -67.0 -56.0 -41.0 -28.0 2005 -28.0 -43.0 -57.0 -67.0 -69.0 -65.0 -65.0 -69.0 -65.0 -55.0 -41.0 -27.0 2006 -28.0 -43.0 -58.0 -64.0 -68.0 -66.0 -68.0 -67.0 -66.0 -57.0 -42.0 -30.0 2007 -28.0 -44.0 -58.0 -64.0 -61.0 -61.0 -67.0 -65.0 -65.0 -55.0 -39.0 -28.0 2008 -29.0 -45.0 -55.0 -65.0 -68.0 -72.0 -67.0 -71.0 -70.0 -59.0 -41.0 -31.0 2009 -31.0 -36.0 -51.0 -62.0 -58.0 -57.0 -53.0 -999.0 -59.0 -56.0 -41.0 -31.0 2010 -29.0 -39.0 -51.0 -62.0 -62.0 -66.0 -67.0 -70.0 -66.0 -57.0 -44.0 -27.0 2011 -28.0 -41.0 -59.0 -62.0 -69.0 -70.0 -63.0 -62.0 -65.0 -57.0 -40.0 -28.0 2012 -29.0 -46.0 -59.0 -67.0 -57.0 -70.0 -71.0 -72.0 -72.0 -57.0 -42.0 -30.0 2013 -30.0 -45.0 -59.0 -65.0 -66.0 -63.0 -66.0 -64.0 -62.0 -57.0 -41.0 -30.0 2014 -29.0 -43.0 -58.0 -64.0 -63.0 -63.0 -68.0 -66.0 -63.0 -56.0 -41.0 -33.0 2015 -32.0 -42.0 -56.0 -64.0 -70.0 -64.0 -66.0 -70.0 -66.0 -54.0 -41.0 -28.0 2016 -31.0 -42.0 -56.0 -62.0 -60.0 -62.0 -62.0 -58.0 -61.0 -55.0 -40.0 -30.0 2017 -29.0 -42.0 -59.0 -68.0 -65.0 -71.0 -67.0 -67.0 -67.0 -51.0 -39.0 -31.0 2018 -29.0 -43.0 -57.0 -63.0 -61.0 -64.0 -66.0 -64.0 -65.0 -54.0 -38.0 -25.0 2019 -27.0 -41.0 -59.0 -67.0 -69.0 -71.0 -65.0 -65.0 -65.0 -54.0 -39.0 -27.0 2020 -29.0 -43.0 -61.0 -63.0 -64.0 -66.0 -63.0 -67.0 -60.0 -56.0 -38.0 -29.0 2021 -30.0 -44.0 -58.0 -65.0 -69.0 -70.0 -67.0 -64.0 -64.0 -54.0 -41.0 -27.0 2022 -25.0 -34.0 -43.0 -43.0 -44.0 -56.0 -58.0 -63.0 -64.0 -54.0 -43.0 -32.0 2023 -32.0 -40.0 -55.0 -58.0 -65.0 -61.0 -65.0 -71.0 -63.0 -56.0 -43.0 -30.0