| Year | Value | | 2022 | 11,268 | | 2021 | 9,986 | | 2020 | 8,899 | | 2019 | 8,022 | | 2018 | 7,247 | | 2017 | 6,579 | | 2016 | 6,007 | | 2015 | 5,491 | | 2014 | 5,108 | | 2013 | 4,882 | | 2012 | 4,685 | | 2011 | 4,584 | | 2010 | 4,680 | | 2009 | 4,795 | | 2008 | 4,845 | | 2007 | 4,929 | | 2006 | 5,035 | | 2005 | 5,118 | | 2004 | 5,177 | | 2003 | 5,197 | | 2002 | 5,190 | | 2001 | 5,152 | | 2000 | 5,067 | | 1999 | 4,964 | | 1998 | 4,842 | | 1997 | 4,680 | | 1996 | 4,524 | | 1995 | 4,395 | | 1994 | 4,248 | | 1993 | 4,098 | | 1992 | 3,970 | | 1991 | 3,796 | | 1990 | 3,624 | | 1989 | 3,518 | | 1988 | 3,416 | | 1987 | 3,311 | | 1986 | 3,233 | | 1985 | 3,192 | | 1984 | 3,180 | | 1983 | 3,197 | | 1982 | 3,224 | | 1981 | 3,226 | | 1980 | 3,144 | | 1979 | 2,992 | | 1978 | 2,824 | | 1977 | 2,661 | | 1976 | 2,517 | | 1975 | 2,406 | | 1974 | 2,332 | | 1973 | 2,286 | | 1972 | 2,248 | | 1971 | 2,198 | | 1970 | 2,117 | | 1969 | 2,008 | | 1968 | 1,888 | | 1967 | 1,793 | | 1966 | 1,745 | | 1965 | 1,748 | | 1964 | 1,771 | | 1963 | 1,807 | | 1962 | 1,824 | | 1961 | 1,808 | | 1960 | 1,730 |
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