| Year | Value | | 2022 | 6,312 | | 2021 | 6,140 | | 2020 | 5,941 | | 2019 | 5,719 | | 2018 | 5,472 | | 2017 | 5,209 | | 2016 | 4,954 | | 2015 | 4,733 | | 2014 | 4,537 | | 2013 | 4,350 | | 2012 | 4,167 | | 2011 | 3,981 | | 2010 | 3,791 | | 2009 | 3,617 | | 2008 | 3,468 | | 2007 | 3,345 | | 2006 | 3,236 | | 2005 | 3,136 | | 2004 | 3,032 | | 2003 | 2,911 | | 2002 | 2,774 | | 2001 | 2,645 | | 2000 | 2,542 | | 1999 | 2,450 | | 1998 | 2,369 | | 1997 | 2,295 | | 1996 | 2,218 | | 1995 | 2,138 | | 1994 | 2,056 | | 1993 | 1,976 | | 1992 | 1,906 | | 1991 | 1,854 | | 1990 | 1,814 | | 1989 | 1,775 | | 1988 | 1,741 | | 1987 | 1,720 | | 1986 | 1,720 | | 1985 | 1,747 | | 1984 | 1,799 | | 1983 | 1,871 | | 1982 | 1,952 | | 1981 | 1,976 | | 1980 | 1,944 | | 1979 | 1,917 | | 1978 | 1,893 | | 1977 | 1,868 | | 1976 | 1,838 | | 1975 | 1,798 | | 1974 | 1,754 | | 1973 | 1,706 | | 1972 | 1,650 | | 1971 | 1,595 | | 1970 | 1,572 | | 1969 | 1,668 | | 1968 | 1,813 | | 1967 | 1,889 | | 1966 | 1,909 | | 1965 | 1,896 | | 1964 | 1,870 | | 1963 | 1,846 | | 1962 | 1,827 | | 1961 | 1,807 | | 1960 | 1,857 |
|