| Year | Value | | 2022 | 6,540 | | 2021 | 6,375 | | 2020 | 6,173 | | 2019 | 5,926 | | 2018 | 5,649 | | 2017 | 5,395 | | 2016 | 5,199 | | 2015 | 5,043 | | 2014 | 4,921 | | 2013 | 4,785 | | 2012 | 4,652 | | 2011 | 4,514 | | 2010 | 4,377 | | 2009 | 4,246 | | 2008 | 4,109 | | 2007 | 3,962 | | 2006 | 3,827 | | 2005 | 3,697 | | 2004 | 3,572 | | 2003 | 3,459 | | 2002 | 3,341 | | 2001 | 3,209 | | 2000 | 3,076 | | 1999 | 2,951 | | 1998 | 2,831 | | 1997 | 2,714 | | 1996 | 2,604 | | 1995 | 2,499 | | 1994 | 2,390 | | 1993 | 2,283 | | 1992 | 2,190 | | 1991 | 2,108 | | 1990 | 2,028 | | 1989 | 1,943 | | 1988 | 1,857 | | 1987 | 1,772 | | 1986 | 1,689 | | 1985 | 1,613 | | 1984 | 1,544 | | 1983 | 1,485 | | 1982 | 1,442 | | 1981 | 1,414 | | 1980 | 1,400 | | 1979 | 1,402 | | 1978 | 1,409 | | 1977 | 1,407 | | 1976 | 1,393 | | 1975 | 1,386 | | 1974 | 1,381 | | 1973 | 1,360 | | 1972 | 1,327 | | 1971 | 1,266 | | 1970 | 1,179 | | 1969 | 1,103 | | 1968 | 1,066 | | 1967 | 1,032 | | 1966 | 995 | | 1965 | 962 | | 1964 | 937 | | 1963 | 911 | | 1962 | 888 | | 1961 | 869 | | 1960 | 851 |
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