| Year | Value | | 2022 | 9,538 | | 2021 | 9,454 | | 2020 | 9,259 | | 2019 | 8,964 | | 2018 | 8,678 | | 2017 | 8,401 | | 2016 | 8,107 | | 2015 | 7,787 | | 2014 | 7,443 | | 2013 | 7,103 | | 2012 | 6,824 | | 2011 | 6,627 | | 2010 | 6,472 | | 2009 | 6,303 | | 2008 | 6,122 | | 2007 | 5,918 | | 2006 | 5,666 | | 2005 | 5,378 | | 2004 | 5,073 | | 2003 | 4,786 | | 2002 | 4,528 | | 2001 | 4,300 | | 2000 | 4,044 | | 1999 | 3,788 | | 1998 | 3,585 | | 1997 | 3,411 | | 1996 | 3,233 | | 1995 | 3,059 | | 1994 | 2,879 | | 1993 | 2,684 | | 1992 | 2,514 | | 1991 | 2,353 | | 1990 | 2,212 | | 1989 | 2,095 | | 1988 | 1,979 | | 1987 | 1,876 | | 1986 | 1,800 | | 1985 | 1,753 | | 1984 | 1,719 | | 1983 | 1,642 | | 1982 | 1,502 | | 1981 | 1,350 | | 1980 | 1,224 | | 1979 | 1,121 | | 1978 | 1,050 | | 1977 | 1,016 | | 1976 | 1,007 | | 1975 | 1,016 | | 1974 | 1,037 | | 1973 | 1,063 | | 1972 | 1,053 | | 1971 | 965 | | 1970 | 846 | | 1969 | 748 | | 1968 | 674 | | 1967 | 622 | | 1966 | 587 | | 1965 | 569 | | 1964 | 569 | | 1963 | 587 | | 1962 | 578 | | 1961 | 495 | | 1960 | 408 |
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