| Year | Value | | 2022 | 8,769 | | 2021 | 8,517 | | 2020 | 8,164 | | 2019 | 7,711 | | 2018 | 7,268 | | 2017 | 6,863 | | 2016 | 6,461 | | 2015 | 6,084 | | 2014 | 5,744 | | 2013 | 5,446 | | 2012 | 5,185 | | 2011 | 4,953 | | 2010 | 4,743 | | 2009 | 4,552 | | 2008 | 4,379 | | 2007 | 4,224 | | 2006 | 4,081 | | 2005 | 3,957 | | 2004 | 3,860 | | 2003 | 3,795 | | 2002 | 3,769 | | 2001 | 3,780 | | 2000 | 3,812 | | 1999 | 3,844 | | 1998 | 3,863 | | 1997 | 3,864 | | 1996 | 3,865 | | 1995 | 3,871 | | 1994 | 3,880 | | 1993 | 3,883 | | 1992 | 3,876 | | 1991 | 3,857 | | 1990 | 3,817 | | 1989 | 3,754 | | 1988 | 3,676 | | 1987 | 3,587 | | 1986 | 3,490 | | 1985 | 3,396 | | 1984 | 3,302 | | 1983 | 3,211 | | 1982 | 3,118 | | 1981 | 3,020 | | 1980 | 2,923 | | 1979 | 2,827 | | 1978 | 2,732 | | 1977 | 2,639 | | 1976 | 2,543 | | 1975 | 2,446 | | 1974 | 2,352 | | 1973 | 2,259 | | 1972 | 2,172 | | 1971 | 2,097 | | 1970 | 2,037 | | 1969 | 1,987 | | 1968 | 1,944 | | 1967 | 1,909 | | 1966 | 1,876 | | 1965 | 1,844 | | 1964 | 1,813 | | 1963 | 1,784 | | 1962 | 1,754 | | 1961 | 1,724 | | 1960 | 1,694 |
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