| Year | Value | | 2022 | 9,070 | | 2021 | 8,786 | | 2020 | 8,816 | | 2019 | 8,589 | | 2018 | 8,089 | | 2017 | 7,573 | | 2016 | 7,100 | | 2015 | 6,656 | | 2014 | 6,260 | | 2013 | 5,969 | | 2012 | 5,742 | | 2011 | 5,555 | | 2010 | 5,366 | | 2009 | 5,171 | | 2008 | 4,999 | | 2007 | 4,828 | | 2006 | 4,659 | | 2005 | 4,465 | | 2004 | 4,225 | | 2003 | 3,991 | | 2002 | 3,788 | | 2001 | 3,575 | | 2000 | 3,367 | | 1999 | 3,167 | | 1998 | 2,978 | | 1997 | 2,842 | | 1996 | 2,764 | | 1995 | 2,694 | | 1994 | 2,593 | | 1993 | 2,489 | | 1992 | 2,389 | | 1991 | 2,287 | | 1990 | 2,132 | | 1989 | 1,996 | | 1988 | 1,858 | | 1987 | 1,722 | | 1986 | 1,586 | | 1985 | 1,456 | | 1984 | 1,340 | | 1983 | 1,249 | | 1982 | 1,170 | | 1981 | 1,102 | | 1980 | 1,060 | | 1979 | 1,038 | | 1978 | 1,021 | | 1977 | 1,007 | | 1976 | 1,001 | | 1975 | 990 | | 1974 | 974 | | 1973 | 967 | | 1972 | 967 | | 1971 | 970 | | 1970 | 976 | | 1969 | 987 | | 1968 | 997 | | 1967 | 1,002 | | 1966 | 1,008 | | 1965 | 1,019 | | 1964 | 1,021 | | 1963 | 1,020 | | 1962 | 1,023 | | 1961 | 1,018 | | 1960 | 1,016 |
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