| Year | Value | | 2022 | 7,449 | | 2021 | 7,041 | | 2020 | 6,641 | | 2019 | 6,275 | | 2018 | 5,942 | | 2017 | 5,657 | | 2016 | 5,451 | | 2015 | 5,307 | | 2014 | 5,206 | | 2013 | 5,126 | | 2012 | 5,052 | | 2011 | 4,986 | | 2010 | 4,929 | | 2009 | 4,857 | | 2008 | 4,761 | | 2007 | 4,659 | | 2006 | 4,548 | | 2005 | 4,435 | | 2004 | 4,329 | | 2003 | 4,241 | | 2002 | 4,162 | | 2001 | 4,086 | | 2000 | 4,014 | | 1999 | 3,903 | | 1998 | 3,760 | | 1997 | 3,635 | | 1996 | 3,519 | | 1995 | 3,409 | | 1994 | 3,309 | | 1993 | 3,222 | | 1992 | 3,141 | | 1991 | 3,068 | | 1990 | 3,001 | | 1989 | 2,935 | | 1988 | 2,870 | | 1987 | 2,814 | | 1986 | 2,756 | | 1985 | 2,680 | | 1984 | 2,594 | | 1983 | 2,512 | | 1982 | 2,436 | | 1981 | 2,362 | | 1980 | 2,294 | | 1979 | 2,230 | | 1978 | 2,172 | | 1977 | 2,123 | | 1976 | 2,090 | | 1975 | 2,056 | | 1974 | 2,008 | | 1973 | 1,951 | | 1972 | 1,888 | | 1971 | 1,820 | | 1970 | 1,752 | | 1969 | 1,694 | | 1968 | 1,648 | | 1967 | 1,605 | | 1966 | 1,563 | | 1965 | 1,524 | | 1964 | 1,487 | | 1963 | 1,446 | | 1962 | 1,405 | | 1961 | 1,365 | | 1960 | 1,328 |
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