| Year | Value | | 2022 | 5,802 | | 2021 | 5,758 | | 2020 | 5,661 | | 2019 | 5,506 | | 2018 | 5,333 | | 2017 | 5,186 | | 2016 | 5,062 | | 2015 | 4,958 | | 2014 | 4,874 | | 2013 | 4,810 | | 2012 | 4,763 | | 2011 | 4,721 | | 2010 | 4,685 | | 2009 | 4,660 | | 2008 | 4,637 | | 2007 | 4,616 | | 2006 | 4,614 | | 2005 | 4,636 | | 2004 | 4,677 | | 2003 | 4,739 | | 2002 | 4,739 | | 2001 | 4,654 | | 2000 | 4,548 | | 1999 | 4,422 | | 1998 | 4,280 | | 1997 | 4,129 | | 1996 | 3,989 | | 1995 | 3,876 | | 1994 | 3,815 | | 1993 | 3,814 | | 1992 | 3,800 | | 1991 | 3,726 | | 1990 | 3,627 | | 1989 | 3,530 | | 1988 | 3,439 | | 1987 | 3,353 | | 1986 | 3,276 | | 1985 | 3,211 | | 1984 | 3,155 | | 1983 | 3,006 | | 1982 | 2,778 | | 1981 | 2,572 | | 1980 | 2,364 | | 1979 | 2,153 | | 1978 | 1,947 | | 1977 | 1,752 | | 1976 | 1,572 | | 1975 | 1,403 | | 1974 | 1,242 | | 1973 | 1,143 | | 1972 | 1,101 | | 1971 | 1,063 | | 1970 | 1,026 | | 1969 | 990 | | 1968 | 955 | | 1967 | 922 | | 1966 | 888 | | 1965 | 856 | | 1964 | 826 | | 1963 | 797 | | 1962 | 769 | | 1961 | 741 | | 1960 | 713 |
|