| Year | Value | | 2022 | 8,187 | | 2021 | 7,801 | | 2020 | 7,337 | | 2019 | 6,826 | | 2018 | 6,341 | | 2017 | 5,921 | | 2016 | 5,579 | | 2015 | 5,306 | | 2014 | 5,011 | | 2013 | 4,669 | | 2012 | 4,340 | | 2011 | 4,032 | | 2010 | 3,772 | | 2009 | 3,621 | | 2008 | 3,565 | | 2007 | 3,514 | | 2006 | 3,414 | | 2005 | 3,255 | | 2004 | 3,045 | | 2003 | 2,821 | | 2002 | 2,611 | | 2001 | 2,418 | | 2000 | 2,243 | | 1999 | 2,093 | | 1998 | 1,954 | | 1997 | 1,817 | | 1996 | 1,690 | | 1995 | 1,577 | | 1994 | 1,478 | | 1993 | 1,394 | | 1992 | 1,320 | | 1991 | 1,252 | | 1990 | 1,214 | | 1989 | 1,186 | | 1988 | 1,128 | | 1987 | 1,051 | | 1986 | 970 | | 1985 | 899 | | 1984 | 847 | | 1983 | 822 | | 1982 | 819 | | 1981 | 831 | | 1980 | 944 | | 1979 | 1,158 | | 1978 | 1,340 | | 1977 | 1,440 | | 1976 | 1,476 | | 1975 | 1,477 | | 1974 | 1,427 | | 1973 | 1,317 | | 1972 | 1,197 | | 1971 | 1,102 | | 1970 | 1,048 | | 1969 | 1,036 | | 1968 | 1,079 | | 1967 | 1,167 | | 1966 | 1,255 | | 1965 | 1,315 | | 1964 | 1,348 | | 1963 | 1,344 | | 1962 | 1,305 | | 1961 | 1,259 | | 1960 | 1,226 |
|