1958 -25.7 -39.9 -53.0 -60.9 -58.3 -64.5 -61.7 -67.2 -62.4 -56.8 -38.8 -29.7 1959 -30.1 -38.7 -49.6 -58.4 -61.7 -63.1 -65.2 -66.2 -68.4 -52.6 -40.2 -27.6 1960 -31.1 -39.2 -58.1 -65.4 -64.8 -67.2 -64.1 -67.8 -61.8 -53.2 -39.9 -29.5 1961 -27.8 -39.3 -54.0 -63.5 -62.2 -55.8 -60.8 -64.3 -57.5 -50.3 -38.7 -29.8 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 -39.9 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -52.8 -39.4 -28.9 1964 -27.7 -41.1 -999.0 -999.0 -66.3 -58.1 -64.4 -57.9 -66.6 -52.3 -37.0 -27.7 1965 -28.6 -37.9 -54.9 -999.0 -60.8 -62.6 -65.8 -62.3 -62.7 -51.0 -38.4 -28.5 1966 -30.3 -37.0 -50.0 -62.5 -63.4 -65.8 -64.3 -68.3 -63.6 -51.8 -38.0 -25.7 1967 -25.8 -36.1 -50.7 -63.7 -67.0 -63.8 -999.0 -70.1 -60.3 -51.3 -35.5 -26.4 1968 -28.3 -39.6 -53.3 -59.3 -61.1 -58.8 -67.1 -66.5 -67.0 -47.0 -37.4 -28.4 1969 -27.6 -38.7 -54.3 -60.4 -61.0 -58.9 -65.3 -65.8 -65.9 -49.7 -40.0 -28.5 1970 -27.6 -38.7 -51.6 -62.0 -63.0 -59.7 -62.7 -67.0 -59.4 -49.8 -38.5 -27.3 1971 -25.8 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -26.1 1972 -26.2 -39.3 -53.1 -62.6 -62.5 -62.3 -65.0 -56.3 -57.9 -50.9 -38.2 -29.0 1973 -29.2 -999.0 -999.0 -55.9 -59.2 -60.2 -64.5 -67.3 -58.0 -50.4 -35.7 -29.7 1974 -24.6 -40.6 -57.2 -65.9 -63.7 -58.7 -62.2 -65.0 -64.0 -48.7 -36.7 -27.5 1975 -26.8 -40.0 -50.8 -59.8 -57.3 -62.8 -65.9 -69.7 -65.7 -50.9 -36.4 -28.7 1976 -27.4 -38.0 -53.5 -62.9 -66.7 -60.1 -53.8 -60.9 -63.5 -51.4 -37.0 -24.5 1977 -25.8 -37.5 -52.4 -63.8 -57.8 -60.9 -60.0 -63.1 -67.0 -53.2 -39.8 -23.3 1978 -29.7 -37.6 -54.4 -61.3 -60.8 -60.0 -58.5 -70.4 -59.8 -52.5 -36.7 -25.5 1979 -27.5 -40.4 -56.4 -58.3 -66.3 -65.6 -69.0 -64.6 -63.3 -56.2 -38.8 -26.5 1980 -25.5 -37.7 -49.3 -58.6 -61.2 -57.2 -59.7 -56.7 -57.2 -51.1 -36.2 -27.0 1981 -28.8 -38.9 -52.3 -62.3 -65.4 -62.0 -58.5 -55.5 -56.6 -52.7 -38.8 -27.3 1982 -27.9 -38.0 -50.8 -999.0 -59.2 -59.3 -57.7 -69.2 -66.7 -50.9 -33.4 -26.5 1983 -26.7 -38.7 -53.2 -60.1 -58.3 -56.8 -70.9 -63.5 -55.3 -50.2 -39.1 -28.5 1984 -27.3 -41.2 -52.7 -58.8 -56.1 -66.7 -61.4 -64.7 -58.9 -52.5 -36.8 -25.9 1985 -26.3 -40.7 -55.0 -58.7 -65.2 -62.6 -65.4 -61.5 -62.9 -52.2 -38.8 -28.0 1986 -26.5 -33.4 -54.3 -63.5 -63.8 -66.6 -63.4 -65.4 -61.4 -50.3 -37.2 -27.2 1987 -26.3 -39.7 -51.7 -60.6 -63.7 -54.1 -61.5 -72.2 -61.5 -50.0 -39.0 -27.5 1988 -27.1 -39.8 -51.8 -62.0 -59.5 -60.1 -67.1 -62.1 -61.8 -49.8 -37.8 -28.4 1989 -29.4 -39.2 -52.4 -63.4 -65.6 -64.8 -63.2 -60.7 -55.9 -47.7 -37.0 -23.4 1990 -25.5 -38.5 -51.0 -58.0 -62.9 -61.2 -62.3 -65.5 -60.5 -48.9 -35.3 -24.0 1991 -27.3 -36.4 -52.6 -58.3 -65.0 -57.6 -54.5 -62.6 -64.1 -52.7 -37.2 -25.6 1992 -19.0 -35.3 -52.8 -61.9 -62.0 -59.0 -64.5 -58.4 -62.9 -52.0 -36.1 -28.4 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 -28.0 -38.3 -53.1 -62.5 -65.8 -63.8 -51.7 -63.7 -63.3 -51.4 -36.9 -27.4 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 -27.8 -38.3 -53.4 -61.2 -64.6 -39.9 -69.5 -67.9 -61.4 -50.3 -34.1 -999.0 1998 -28.8 -38.8 -55.3 -64.9 -62.7 -64.9 -63.2 -64.4 -68.6 -54.5 -38.4 -27.3 1999 -27.2 -39.4 -53.2 -67.3 -66.9 -60.2 -66.1 -63.6 -63.6 -53.2 -37.4 -30.6 2000 -26.6 -39.3 -55.9 -61.3 -63.5 -54.8 -61.9 -62.1 -60.9 -55.2 -35.5 -25.9 2001 -26.2 -36.8 -52.2 -59.0 -58.8 -62.5 -62.0 -63.9 -60.6 -50.3 -35.2 -25.5 2002 -24.1 -38.8 -51.4 -57.2 -54.0 -60.7 -59.9 -67.6 -62.7 -50.0 -37.9 -29.1 2003 -26.7 -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 -52.4 -58.2 -60.4 -61.4 -64.7 -56.7 -60.6 -50.6 -36.5 -999.0 2005 -26.6 -39.2 -52.3 -62.7 -63.1 -59.4 -58.7 -63.5 -57.7 -49.1 -36.4 -24.1 2006 -27.2 -38.5 -53.8 -58.0 -62.3 -60.9 -62.8 -61.6 -58.9 -51.3 -37.7 -27.9 2007 -26.6 -40.3 -51.3 -58.9 -55.5 -54.7 -60.5 -60.2 -59.9 -50.6 -37.1 -28.7 2008 -28.5 -40.7 -49.9 -60.1 -63.8 -66.8 -61.9 -64.9 -62.8 -64.1 -34.6 -26.1 2009 -25.3 -35.6 -52.4 -64.1 -58.5 -56.9 -54.0 -62.7 -59.6 -51.8 -35.4 -27.4 2010 -25.9 -38.1 -50.6 -63.7 -61.1 -64.9 -64.8 -66.6 -60.3 -51.8 -37.5 -25.7 2011 -25.6 -36.2 -52.9 -56.9 -64.7 -64.9 -56.6 -56.8 -58.9 -49.9 -34.8 -25.7 2012 -26.5 -40.0 -53.8 -62.2 -64.0 -63.4 -65.3 -67.2 -65.3 -47.8 -35.1 -24.5 2013 -26.7 -40.8 -56.0 -60.6 -62.4 -56.5 -61.3 -58.0 -53.8 -48.9 -34.1 -26.1 2014 -24.2 -38.4 -54.3 -61.7 -58.3 -58.7 -64.4 -60.3 -57.4 -49.0 -34.6 -27.8 2015 -27.7 -38.3 -52.7 -61.2 -66.8 -59.6 -61.5 -65.5 -61.3 -47.3 -34.7 -24.6 2016 -27.2 -38.6 -55.9 -63.5 -60.1 -66.7 -68.6 -58.5 -60.7 -51.6 -34.0 -26.5 2017 -25.6 -37.8 -54.4 -63.5 -59.9 -65.8 -61.0 -61.1 -62.1 -45.7 -34.5 -27.9 2018 -26.9 -38.8 -51.5 -58.9 -56.5 -59.1 -60.7 -58.9 -58.9 -48.6 -35.9 -24.9 2019 -24.9 -34.9 -52.7 -63.9 -65.0 -65.7 -60.4 -60.3 -60.1 -47.6 -34.9 -24.9 2020 -25.7 -38.2 -56.3 -58.4 -59.2 -61.6 -56.6 -60.8 -53.9 -50.5 -33.2 -27.0 2021 -26.7 -39.4 -52.5 -61.3 -65.0 -66.2 -62.2 -57.5 -57.3 -46.7 -35.9 -24.3 2022 -28.2 -36.8 -48.3 -64.1 -60.0 -57.5 -61.1 -63.3 -63.3 -50.5 -38.8 -29.4 2023 -29.8 -37.0 -53.5 -65.9 -64.3 -58.6 -61.4 -67.5 -58.7 -52.4 -39.2 -29.6