| Year | Value | | 2022 | 9,562 | | 2021 | 9,240 | | 2020 | 8,907 | | 2019 | 8,578 | | 2018 | 8,274 | | 2017 | 7,994 | | 2016 | 7,752 | | 2015 | 7,552 | | 2014 | 7,393 | | 2013 | 7,264 | | 2012 | 7,148 | | 2011 | 7,028 | | 2010 | 6,900 | | 2009 | 6,772 | | 2008 | 6,654 | | 2007 | 6,538 | | 2006 | 6,416 | | 2005 | 6,308 | | 2004 | 6,228 | | 2003 | 6,130 | | 2002 | 5,981 | | 2001 | 5,789 | | 2000 | 5,556 | | 1999 | 5,290 | | 1998 | 5,036 | | 1997 | 4,820 | | 1996 | 4,620 | | 1995 | 4,425 | | 1994 | 4,269 | | 1993 | 4,163 | | 1992 | 4,252 | | 1991 | 4,317 | | 1990 | 4,150 | | 1989 | 3,956 | | 1988 | 3,767 | | 1987 | 3,589 | | 1986 | 3,421 | | 1985 | 3,260 | | 1984 | 3,108 | | 1983 | 2,965 | | 1982 | 2,830 | | 1981 | 2,702 | | 1980 | 2,581 | | 1979 | 2,469 | | 1978 | 2,363 | | 1977 | 2,261 | | 1976 | 2,165 | | 1975 | 2,074 | | 1974 | 1,989 | | 1973 | 1,909 | | 1972 | 1,832 | | 1971 | 1,760 | | 1970 | 1,695 | | 1969 | 1,634 | | 1968 | 1,578 | | 1967 | 1,527 | | 1966 | 1,479 | | 1965 | 1,434 | | 1964 | 1,391 | | 1963 | 1,352 | | 1962 | 1,318 | | 1961 | 1,284 | | 1960 | 1,255 |
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