| Year | Value | | 2022 | 9,991 | | 2021 | 9,568 | | 2020 | 9,365 | | 2019 | 9,168 | | 2018 | 8,898 | | 2017 | 8,618 | | 2016 | 8,332 | | 2015 | 8,095 | | 2014 | 7,816 | | 2013 | 7,488 | | 2012 | 7,112 | | 2011 | 6,713 | | 2010 | 6,283 | | 2009 | 5,848 | | 2008 | 5,376 | | 2007 | 4,968 | | 2006 | 4,603 | | 2005 | 4,279 | | 2004 | 4,080 | | 2003 | 3,980 | | 2002 | 3,913 | | 2001 | 3,812 | | 2000 | 3,724 | | 1999 | 3,685 | | 1998 | 3,734 | | 1997 | 3,844 | | 1996 | 3,913 | | 1995 | 3,927 | | 1994 | 3,863 | | 1993 | 3,765 | | 1992 | 3,671 | | 1991 | 3,559 | | 1990 | 3,436 | | 1989 | 3,336 | | 1988 | 3,243 | | 1987 | 3,127 | | 1986 | 3,029 | | 1985 | 2,966 | | 1984 | 2,891 | | 1983 | 2,816 | | 1982 | 2,743 | | 1981 | 2,652 | | 1980 | 2,558 | | 1979 | 2,450 | | 1978 | 2,378 | | 1977 | 2,360 | | 1976 | 2,379 | | 1975 | 2,359 | | 1974 | 2,286 | | 1973 | 2,237 | | 1972 | 2,210 | | 1971 | 2,208 | | 1970 | 2,231 | | 1969 | 2,240 | | 1968 | 2,200 | | 1967 | 2,159 | | 1966 | 2,134 | | 1965 | 2,134 | | 1964 | 2,112 | | 1963 | 2,054 | | 1962 | 2,033 | | 1961 | 2,001 | | 1960 | 1,958 |
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