1958 4.6 3.5 4.8 4.1 5.3 4.9 4.9 4.4 5.0 3.7 3.8 4.3 1959 4.0 4.7 6.5 5.5 5.0 4.9 5.6 5.7 6.5 6.0 6.2 5.0 1960 -999.0 5.2 5.6 5.0 4.6 5.3 5.2 5.0 5.3 5.7 4.6 5.5 1961 4.7 6.0 5.8 4.8 4.7 4.9 4.5 4.7 4.9 6.3 5.2 4.6 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 3.9 5.1 5.7 5.7 6.2 5.9 5.6 6.3 5.2 4.3 4.6 1964 4.4 3.7 3.6 4.2 4.5 5.3 4.8 4.5 4.5 4.7 4.8 4.1 1965 4.1 4.5 5.2 5.6 5.6 5.2 4.5 5.5 5.1 5.2 4.4 4.8 1966 4.1 4.5 5.0 4.1 5.1 4.9 5.1 5.3 5.5 5.2 5.7 5.3 1967 4.2 4.3 5.3 7.6 7.1 7.0 6.6 6.0 6.5 7.4 6.0 4.7 1968 3.8 6.8 7.6 8.8 7.4 6.6 6.8 6.7 6.7 7.8 6.4 5.1 1969 5.6 6.0 7.3 7.5 7.4 7.9 7.5 6.6 6.3 6.7 7.0 6.6 1970 7.4 4.8 5.1 4.6 5.3 5.0 4.2 5.2 4.4 4.5 3.8 3.5 1971 4.4 6.4 6.6 5.9 6.1 6.0 6.4 6.6 6.6 5.6 6.1 6.1 1972 3.6 4.7 5.5 5.6 5.3 5.3 5.3 5.6 5.0 6.2 4.6 3.8 1973 4.4 5.1 5.3 5.5 5.4 5.1 4.1 4.9 5.4 5.8 5.2 3.8 1974 4.2 4.8 5.1 5.2 5.9 5.7 6.2 6.0 5.8 5.3 5.6 4.5 1975 4.0 4.0 4.6 5.1 3.9 4.6 5.1 5.0 4.6 4.8 4.8 4.1 1976 4.4 4.9 5.0 4.7 3.8 4.4 4.6 4.1 2.5 2.8 3.5 4.4 1977 4.7 5.1 5.2 5.2 5.7 5.9 6.1 5.5 5.2 5.1 4.3 3.9 1978 4.0 3.8 4.4 4.7 4.4 5.1 5.8 5.6 5.9 4.2 4.8 3.8 1979 4.1 4.1 5.0 5.6 4.8 5.3 6.0 4.6 5.1 5.0 4.9 3.0 1980 4.2 5.3 4.9 5.5 5.4 6.3 4.9 6.0 5.1 5.3 4.6 3.5 1981 3.9 4.6 4.9 5.5 5.0 4.9 5.6 4.9 5.4 4.5 4.6 4.2 1982 3.9 4.7 5.6 6.4 6.1 6.8 6.0 4.5 4.7 4.6 5.2 3.9 1983 4.5 5.2 6.0 6.2 6.6 6.4 6.1 6.3 5.7 6.1 4.2 4.2 1984 4.7 4.9 5.4 5.7 5.9 5.1 5.9 5.6 5.8 5.1 5.6 4.8 1985 4.3 4.6 5.2 6.2 5.7 5.9 5.6 5.7 6.5 6.0 5.2 5.1 1986 5.7 5.6 5.8 6.0 6.1 6.0 6.1 5.6 5.9 5.7 5.7 4.6 1987 5.1 5.2 5.7 5.8 5.8 6.1 5.3 5.5 4.7 4.8 5.1 4.2 1988 5.6 5.4 6.5 6.1 5.5 5.9 5.4 5.8 5.7 5.3 5.1 3.6 1989 4.3 5.6 6.0 5.6 5.8 5.7 5.8 5.8 5.7 5.7 5.6 5.3 1990 4.8 5.2 5.3 6.1 5.4 5.6 5.1 5.2 5.6 5.0 4.7 4.5 1991 4.8 5.0 5.6 5.2 5.8 5.5 6.2 4.6 5.7 4.7 5.2 4.1 1992 4.3 4.9 5.4 5.7 5.6 5.7 5.5 5.7 6.0 5.7 5.0 3.7 1993 4.8 4.9 5.6 5.6 6.5 5.8 6.0 5.2 5.2 5.6 5.3 5.4 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 4.7 5.7 5.3 6.0 5.7 5.3 6.6 5.0 4.9 5.7 5.0 5.0 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 4.0 4.8 5.7 6.1 5.9 5.8 5.6 6.0 5.9 5.2 5.6 5.2 1998 4.6 4.5 5.4 5.2 5.9 5.3 5.6 5.6 5.0 4.9 5.6 4.1 1999 4.7 5.1 5.8 5.3 5.6 4.9 5.0 5.6 5.9 5.8 4.9 4.7 2000 4.5 5.6 5.3 5.4 5.0 4.7 2.8 3.5 3.5 4.9 5.8 4.4 2001 3.8 4.7 5.3 5.0 4.5 4.9 3.9 5.2 4.2 5.3 5.6 4.7 2002 4.8 5.0 5.3 4.7 3.7 3.4 4.7 3.8 3.4 6.1 5.2 4.4 2003 -999.0 -999.0 4.6 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 -999.0 2004 -999.0 -999.0 4.8 4.1 3.8 2.8 3.2 3.4 3.5 2.9 3.2 2.5 2005 2.7 4.3 5.7 4.7 4.6 5.0 5.6 5.0 4.9 5.9 5.6 5.3 2006 4.3 4.8 5.0 5.2 4.7 4.6 3.2 3.4 3.6 3.9 5.9 4.4 2007 4.6 4.6 4.6 5.6 4.2 3.6 2.5 2.5 2.5 3.3 5.6 5.2 2008 3.8 5.6 5.6 4.7 4.7 4.3 5.9 4.9 4.9 5.6 5.2 4.4 2009 4.5 5.3 4.3 3.9 4.7 5.0 4.8 4.7 4.9 5.6 4.9 4.1 2010 4.6 5.0 5.8 5.0 5.2 4.5 4.4 4.3 4.9 5.2 5.2 4.6 2011 4.5 5.6 5.0 5.4 5.0 5.0 5.2 5.3 4.8 5.4 5.4 3.8 2012 4.6 5.0 5.3 4.8 4.0 5.0 3.9 4.4 4.7 5.6 5.8 3.8 2013 4.7 5.4 4.9 4.0 3.5 4.5 4.4 3.7 3.6 4.6 6.3 4.2 2014 4.4 1.7 5.5 5.0 3.8 4.1 4.5 5.8 5.0 5.7 4.6 4.6 2015 4.9 4.7 5.0 3.8 4.5 4.2 5.2 4.4 4.7 6.6 6.3 3.9 2016 4.5 4.9 4.8 4.3 3.6 2.5 1.9 3.8 4.3 5.1 4.6 4.1 2017 4.0 4.4 5.2 4.7 5.3 4.9 5.8 4.9 5.3 5.9 5.7 5.0 2018 5.0 5.4 6.0 4.8 6.0 5.2 4.5 4.3 4.7 5.4 4.3 5.6 2019 4.0 5.9 4.5 4.8 3.2 5.3 4.6 4.6 5.6 6.4 4.6 4.0 2020 4.7 4.6 5.3 4.7 5.0 4.8 4.5 5.4 5.7 5.1 6.5 5.1 2021 4.3 4.9 5.2 5.0 4.6 4.2 4.5 4.7 4.4 5.5 6.2 5.9 2022 4.7 4.5 5.1 4.6 5.0 4.7 4.5 4.1 3.8 4.9 4.5 3.2 2023 3.5 4.8 4.9 4.3 4.3 4.8 4.8 4.1 4.5 5.4 4.4 4.7