| Year | Value | | 2022 | 12,750 | | 2021 | 12,429 | | 2020 | 12,024 | | 2019 | 11,561 | | 2018 | 11,103 | | 2017 | 10,681 | | 2016 | 10,321 | | 2015 | 9,985 | | 2014 | 9,677 | | 2013 | 9,354 | | 2012 | 8,999 | | 2011 | 8,653 | | 2010 | 8,293 | | 2009 | 7,939 | | 2008 | 7,562 | | 2007 | 7,191 | | 2006 | 6,910 | | 2005 | 6,649 | | 2004 | 6,369 | | 2003 | 6,010 | | 2002 | 5,660 | | 2001 | 5,358 | | 2000 | 5,103 | | 1999 | 4,989 | | 1998 | 4,906 | | 1997 | 4,770 | | 1996 | 4,627 | | 1995 | 4,319 | | 1994 | 3,994 | | 1993 | 3,786 | | 1992 | 3,583 | | 1991 | 3,708 | | 1990 | 3,823 | | 1989 | 3,671 | | 1988 | 3,529 | | 1987 | 3,393 | | 1986 | 3,264 | | 1985 | 3,142 | | 1984 | 3,028 | | 1983 | 2,915 | | 1982 | 2,808 | | 1981 | 2,711 | | 1980 | 2,624 | | 1979 | 2,547 | | 1978 | 2,484 | | 1977 | 2,432 | | 1976 | 2,387 | | 1975 | 2,343 | | 1974 | 2,296 | | 1973 | 2,244 | | 1972 | 2,192 | | 1971 | 2,144 | | 1970 | 2,104 | | 1969 | 2,073 | | 1968 | 2,054 | | 1967 | 2,049 | | 1966 | 2,044 | | 1965 | 2,032 | | 1964 | 2,014 | | 1963 | 1,991 | | 1962 | 1,961 | | 1961 | 1,930 | | 1960 | 1,904 |
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