1961 -999.0 7.0 4.9 6.0 6.2 5.5 4.0 7.0 7.5 6.7 7.2 6.1 1962 5.1 5.0 6.2 4.6 6.1 7.6 6.7 5.6 6.2 4.3 6.5 6.1 1963 6.5 7.6 6.7 4.3 5.4 7.3 4.3 6.3 5.6 4.4 5.7 6.8 1964 6.4 6.4 6.9 4.9 6.4 3.8 5.7 5.5 5.0 5.4 6.0 6.2 1965 4.2 5.8 6.0 6.0 6.6 7.1 4.7 5.7 2.7 4.9 5.6 7.2 1966 6.2 6.3 4.0 5.6 4.7 5.1 5.8 4.2 5.6 5.0 7.5 7.1 1967 5.6 7.0 8.1 5.4 6.2 6.8 7.5 6.2 5.6 6.5 7.8 5.9 1968 5.6 4.9 5.2 5.4 4.0 4.2 4.2 5.1 5.7 4.6 4.4 6.5 1969 7.1 7.4 6.4 5.1 4.4 6.6 5.6 2.8 3.8 7.4 7.8 6.4 1970 5.3 7.4 7.6 5.0 3.6 4.3 4.2 5.6 4.3 4.8 6.6 6.2 1971 7.2 6.9 6.6 5.3 6.1 4.5 6.0 2.8 6.4 7.1 6.4 6.5 1972 7.3 5.0 5.4 5.9 6.5 6.6 3.8 8.1 6.5 6.4 6.4 6.8 1973 5.2 4.7 5.5 5.3 6.8 6.3 7.2 5.3 5.4 4.8 6.0 6.2 1974 6.4 6.4 7.4 4.6 8.1 4.0 5.6 4.0 4.8 4.7 4.9 5.8 1975 4.5 6.0 6.5 5.4 7.8 6.3 3.8 6.8 4.9 4.4 4.6 6.8 1976 5.7 4.7 7.1 5.7 4.1 6.7 4.8 7.0 5.0 4.9 6.8 6.4 1977 5.1 6.8 6.1 5.8 5.4 6.9 6.4 4.8 4.7 6.3 4.7 4.0 1978 5.2 6.2 6.1 3.4 5.0 4.2 7.5 4.8 7.4 6.2 6.0 5.5 1979 4.5 5.2 6.3 7.5 6.9 4.8 5.8 5.7 5.6 8.0 7.3 6.8 1980 8.1 4.5 8.1 7.0 7.4 5.1 8.2 6.8 5.6 6.0 5.5 6.0 1981 7.4 6.8 5.6 5.9 6.1 4.9 7.6 5.6 4.6 4.2 6.2 6.5 1982 6.1 5.7 6.1 4.9 6.2 4.2 5.5 6.1 6.5 5.4 5.6 6.0 1983 5.1 5.4 5.7 7.2 4.6 5.4 4.1 5.1 5.4 6.2 6.2 5.8 1984 4.6 7.6 6.0 5.1 5.8 5.8 4.8 3.4 5.1 5.9 7.6 6.1 1985 6.1 5.9 6.4 7.2 6.5 7.1 6.4 4.9 6.8 6.4 7.1 6.9 1986 6.7 7.1 5.8 4.3 5.9 3.9 1.8 6.0 5.8 5.2 6.3 6.6 1987 5.7 7.1 7.8 6.6 7.4 6.3 6.8 7.3 5.3 5.6 7.0 5.6 1988 7.7 8.8 5.2 5.9 5.1 8.0 5.6 3.8 5.5 4.5 4.3 5.3 1989 7.5 6.9 6.2 5.2 4.3 5.3 6.1 5.2 4.6 5.8 7.8 7.3 1990 6.3 7.8 6.0 6.4 6.3 3.9 6.9 3.1 4.3 6.0 4.8 5.6 1991 7.1 7.3 6.1 4.4 5.2 5.9 6.3 4.6 6.7 5.2 7.8 7.9 1992 7.0 7.0 7.7 5.8 6.2 5.3 6.6 5.9 6.8 5.8 6.6 7.9 1993 8.8 7.9 5.9 4.9 6.3 5.2 5.2 5.6 7.6 6.8 3.9 7.3 1994 5.5 5.9 6.9 6.5 5.7 6.2 6.7 7.6 4.9 6.7 6.1 6.3 1995 7.3 7.8 5.8 7.3 7.2 6.0 5.7 6.6 4.0 6.3 7.6 8.0 1996 7.2 6.5 5.6 5.7 4.3 5.8 7.9 5.2 7.5 6.9 5.0 5.4 1997 4.9 4.8 5.9 6.4 -999.0 6.1 4.7 4.7 5.9 4.3 6.9 5.1 1998 6.5 5.7 7.6 3.8 6.3 5.6 6.4 4.8 5.1 5.6 4.7 5.0 1999 7.4 6.5 6.9 5.2 4.9 6.2 5.4 7.7 7.0 4.9 4.6 6.2 2000 6.3 6.3 6.3 5.3 4.5 6.9 6.0 6.9 7.6 7.0 7.6 6.3 2001 8.0 8.1 6.8 5.9 6.4 6.8 6.1 4.9 4.6 7.7 5.0 6.2 2002 6.1 6.1 5.8 7.0 6.7 7.9 7.9 7.4 7.4 7.8 4.5 6.6 2003 7.0 5.5 5.5 6.9 6.7 6.2 7.0 7.7 5.2 6.4 6.9 5.4 2004 7.9 8.0 5.7 3.7 4.8 5.3 4.4 5.5 2.3 5.6 5.7 6.8 2005 5.4 7.3 6.7 8.4 6.9 7.1 5.4 5.5 6.8 6.2 4.8 8.1 2006 7.0 7.6 5.9 5.0 7.1 6.3 5.1 8.9 7.0 5.9 5.6 4.4 2007 5.2 6.6 7.3 4.7 6.9 7.5 6.9 7.1 5.1 6.2 7.7 5.1 2008 6.6 4.8 7.3 5.7 4.8 6.5 6.8 4.5 5.4 5.6 5.6 7.2 2009 7.0 5.9 7.0 6.8 7.4 8.0 6.2 4.8 6.6 6.6 5.7 5.9 2010 5.8 8.5 6.5 5.2 5.5 3.3 5.5 4.8 5.2 4.3 5.4 6.2 2011 6.9 6.4 -999.0 6.6 6.4 7.0 6.4 5.7 6.2 6.6 6.3 7.8 2012 6.1 5.2 4.7 3.8 6.6 4.1 4.3 6.6 5.7 5.2 6.8 5.5 2013 5.5 7.0 6.9 5.6 6.7 5.9 6.9 6.1 5.9 4.3 8.3 7.1 2014 7.2 6.9 6.3 4.7 5.9 5.8 5.0 7.4 5.2 4.4 6.0 5.0 2015 6.5 5.9 7.1 4.8 6.1 6.8 6.3 6.3 5.3 6.7 6.8 5.7 2016 5.5 6.9 5.6 5.0 7.7 4.7 4.4 6.6 5.7 8.6 5.5 5.2 2017 7.0 7.9 5.7 6.7 6.5 6.8 8.2 6.0 5.7 5.1 8.0 6.3 2018 6.7 7.8 5.1 5.3 4.7 6.9 6.5 6.0 6.4 5.6 4.9 5.2 2019 8.1 6.3 5.3 5.7 5.0 5.8 5.4 5.7 5.8 7.3 6.0 5.5 2020 6.8 7.6 7.2 7.5 7.5 6.9 6.4 5.7 6.1 6.6 5.8 5.8 2021 7.1 5.9 8.2 6.8 5.6 6.7 6.4 6.6 6.0 4.2 5.2 7.8 2022 8.1 6.2 6.8 7.0 7.1 6.2 5.9 6.8 4.2 6.8 7.4 6.8 2023 6.3 5.4 7.2 7.0 8.0 7.5 5.6 6.1 6.0 6.8 5.2 7.3