| Year | Value | | 2022 | 4,148 | | 2021 | 3,936 | | 2020 | 3,733 | | 2019 | 3,536 | | 2018 | 3,345 | | 2017 | 3,151 | | 2016 | 2,954 | | 2015 | 2,759 | | 2014 | 2,570 | | 2013 | 2,400 | | 2012 | 2,259 | | 2011 | 2,151 | | 2010 | 2,075 | | 2009 | 2,011 | | 2008 | 1,951 | | 2007 | 1,904 | | 2006 | 1,866 | | 2005 | 1,835 | | 2004 | 1,810 | | 2003 | 1,784 | | 2002 | 1,760 | | 2001 | 1,736 | | 2000 | 1,692 | | 1999 | 1,643 | | 1998 | 1,598 | | 1997 | 1,536 | | 1996 | 1,464 | | 1995 | 1,414 | | 1994 | 1,382 | | 1993 | 1,359 | | 1992 | 1,351 | | 1991 | 1,337 | | 1990 | 1,294 | | 1989 | 1,244 | | 1988 | 1,210 | | 1987 | 1,192 | | 1986 | 1,180 | | 1985 | 1,166 | | 1984 | 1,152 | | 1983 | 1,148 | | 1982 | 1,151 | | 1981 | 1,156 | | 1980 | 1,161 | | 1979 | 1,167 | | 1978 | 1,169 | | 1977 | 1,155 | | 1976 | 1,127 | | 1975 | 1,095 | | 1974 | 1,062 | | 1973 | 1,032 | | 1972 | 1,013 | | 1971 | 1,007 | | 1970 | 1,002 | | 1969 | 996 | | 1968 | 989 | | 1967 | 975 | | 1966 | 954 | | 1965 | 927 | | 1964 | 898 | | 1963 | 868 | | 1962 | 840 | | 1961 | 816 | | 1960 | 791 |
|