| Year | Value | | 2022 | 2,959 | | 2021 | 3,031 | | 2020 | 3,046 | | 2019 | 3,041 | | 2018 | 2,898 | | 2017 | 2,686 | | 2016 | 2,606 | | 2015 | 2,545 | | 2014 | 2,508 | | 2013 | 2,502 | | 2012 | 2,487 | | 2011 | 2,446 | | 2010 | 2,398 | | 2009 | 2,338 | | 2008 | 2,262 | | 2007 | 2,170 | | 2006 | 2,066 | | 2005 | 1,955 | | 2004 | 1,836 | | 2003 | 1,713 | | 2002 | 1,624 | | 2001 | 1,579 | | 2000 | 1,553 | | 1999 | 1,551 | | 1998 | 1,570 | | 1997 | 1,608 | | 1996 | 1,661 | | 1995 | 1,717 | | 1994 | 1,770 | | 1993 | 1,821 | | 1992 | 1,878 | | 1991 | 1,907 | | 1990 | 1,907 | | 1989 | 1,894 | | 1988 | 1,875 | | 1987 | 1,852 | | 1986 | 1,824 | | 1985 | 1,788 | | 1984 | 1,744 | | 1983 | 1,690 | | 1982 | 1,628 | | 1981 | 1,564 | | 1980 | 1,502 | | 1979 | 1,444 | | 1978 | 1,391 | | 1977 | 1,343 | | 1976 | 1,300 | | 1975 | 1,263 | | 1974 | 1,232 | | 1973 | 1,205 | | 1972 | 1,187 | | 1971 | 1,175 | | 1970 | 1,147 | | 1969 | 1,107 | | 1968 | 1,072 | | 1967 | 1,041 | | 1966 | 1,012 | | 1965 | 985 | | 1964 | 961 | | 1963 | 942 | | 1962 | 925 | | 1961 | 910 | | 1960 | 871 |
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