| Year | Value | | 2022 | 15,173 | | 2021 | 13,968 | | 2020 | 12,741 | | 2019 | 11,773 | | 2018 | 11,018 | | 2017 | 10,483 | | 2016 | 9,933 | | 2015 | 9,293 | | 2014 | 8,097 | | 2013 | 6,443 | | 2012 | 5,475 | | 2011 | 5,215 | | 2010 | 5,109 | | 2009 | 5,047 | | 2008 | 4,974 | | 2007 | 4,850 | | 2006 | 4,643 | | 2005 | 4,369 | | 2004 | 4,085 | | 2003 | 3,881 | | 2002 | 3,800 | | 2001 | 3,787 | | 2000 | 3,807 | | 1999 | 3,858 | | 1998 | 3,888 | | 1997 | 3,837 | | 1996 | 3,718 | | 1995 | 3,555 | | 1994 | 3,351 | | 1993 | 3,142 | | 1992 | 2,956 | | 1991 | 2,788 | | 1990 | 2,684 | | 1989 | 2,633 | | 1988 | 2,560 | | 1987 | 2,468 | | 1986 | 2,367 | | 1985 | 2,257 | | 1984 | 2,145 | | 1983 | 2,036 | | 1982 | 1,924 | | 1981 | 1,816 | | 1980 | 1,737 | | 1979 | 1,686 | | 1978 | 1,651 | | 1977 | 1,627 | | 1976 | 1,605 | | 1975 | 1,577 | | 1974 | 1,540 | | 1973 | 1,497 | | 1972 | 1,449 | | 1971 | 1,391 | | 1970 | 1,301 | | 1969 | 1,195 | | 1968 | 1,110 | | 1967 | 1,044 | | 1966 | 990 | | 1965 | 944 | | 1964 | 920 | | 1963 | 909 | | 1962 | 888 | | 1961 | 864 | | 1960 | 840 |
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