| Year | Value | | 2022 | 10,509 | | 2021 | 10,256 | | 2020 | 10,480 | | 2019 | 10,727 | | 2018 | 10,642 | | 2017 | 10,290 | | 2016 | 9,812 | | 2015 | 9,240 | | 2014 | 8,609 | | 2013 | 7,961 | | 2012 | 7,192 | | 2011 | 6,300 | | 2010 | 5,528 | | 2009 | 5,290 | | 2008 | 5,450 | | 2007 | 5,522 | | 2006 | 5,427 | | 2005 | 5,176 | | 2004 | 4,854 | | 2003 | 4,735 | | 2002 | 4,849 | | 2001 | 4,963 | | 2000 | 5,036 | | 1999 | 5,069 | | 1998 | 5,038 | | 1997 | 4,940 | | 1996 | 4,794 | | 1995 | 4,616 | | 1994 | 4,425 | | 1993 | 4,325 | | 1992 | 4,320 | | 1991 | 4,312 | | 1990 | 4,288 | | 1989 | 4,236 | | 1988 | 4,151 | | 1987 | 4,039 | | 1986 | 3,901 | | 1985 | 3,743 | | 1984 | 3,583 | | 1983 | 3,433 | | 1982 | 3,292 | | 1981 | 3,158 | | 1980 | 3,032 | | 1979 | 2,914 | | 1978 | 2,805 | | 1977 | 2,701 | | 1976 | 2,598 | | 1975 | 2,498 | | 1974 | 2,396 | | 1973 | 2,296 | | 1972 | 2,199 | | 1971 | 2,111 | | 1970 | 2,033 | | 1969 | 1,965 | | 1968 | 1,909 | | 1967 | 1,862 | | 1966 | 1,819 | | 1965 | 1,774 | | 1964 | 1,728 | | 1963 | 1,683 | | 1962 | 1,636 | | 1961 | 1,587 | | 1960 | 1,544 |
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