| Year | Value | | 2022 | 10,573 | | 2021 | 10,081 | | 2020 | 9,587 | | 2019 | 9,098 | | 2018 | 8,635 | | 2017 | 8,193 | | 2016 | 7,744 | | 2015 | 7,302 | | 2014 | 6,903 | | 2013 | 6,544 | | 2012 | 6,239 | | 2011 | 6,022 | | 2010 | 5,871 | | 2009 | 5,768 | | 2008 | 5,690 | | 2007 | 5,619 | | 2006 | 5,555 | | 2005 | 5,496 | | 2004 | 5,419 | | 2003 | 5,318 | | 2002 | 5,209 | | 2001 | 5,089 | | 2000 | 4,963 | | 1999 | 4,815 | | 1998 | 4,658 | | 1997 | 4,516 | | 1996 | 4,382 | | 1995 | 4,254 | | 1994 | 4,126 | | 1993 | 3,997 | | 1992 | 3,876 | | 1991 | 3,765 | | 1990 | 3,661 | | 1989 | 3,569 | | 1988 | 3,487 | | 1987 | 3,419 | | 1986 | 3,353 | | 1985 | 3,271 | | 1984 | 3,177 | | 1983 | 3,080 | | 1982 | 2,985 | | 1981 | 2,892 | | 1980 | 2,801 | | 1979 | 2,715 | | 1978 | 2,639 | | 1977 | 2,575 | | 1976 | 2,531 | | 1975 | 2,494 | | 1974 | 2,448 | | 1973 | 2,393 | | 1972 | 2,332 | | 1971 | 2,266 | | 1970 | 2,194 | | 1969 | 2,126 | | 1968 | 2,067 | | 1967 | 2,012 | | 1966 | 1,961 | | 1965 | 1,913 | | 1964 | 1,868 | | 1963 | 1,827 | | 1962 | 1,788 | | 1961 | 1,748 | | 1960 | 1,711 |
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