| Year | Value | | 2022 | 7,992 | | 2021 | 7,988 | | 2020 | 7,945 | | 2019 | 7,846 | | 2018 | 7,735 | | 2017 | 7,622 | | 2016 | 7,513 | | 2015 | 7,405 | | 2014 | 7,296 | | 2013 | 7,179 | | 2012 | 7,061 | | 2011 | 6,946 | | 2010 | 6,832 | | 2009 | 6,727 | | 2008 | 6,629 | | 2007 | 6,534 | | 2006 | 6,440 | | 2005 | 6,348 | | 2004 | 6,253 | | 2003 | 6,158 | | 2002 | 6,068 | | 2001 | 5,984 | | 2000 | 5,903 | | 1999 | 5,823 | | 1998 | 5,745 | | 1997 | 5,665 | | 1996 | 5,584 | | 1995 | 5,503 | | 1994 | 5,423 | | 1993 | 5,339 | | 1992 | 5,257 | | 1991 | 5,176 | | 1990 | 5,094 | | 1989 | 5,014 | | 1988 | 4,934 | | 1987 | 4,855 | | 1986 | 4,776 | | 1985 | 4,699 | | 1984 | 4,627 | | 1983 | 4,556 | | 1982 | 4,486 | | 1981 | 4,413 | | 1980 | 4,335 | | 1979 | 4,255 | | 1978 | 4,174 | | 1977 | 4,095 | | 1976 | 4,014 | | 1975 | 3,936 | | 1974 | 3,863 | | 1973 | 3,791 | | 1972 | 3,719 | | 1971 | 3,650 | | 1970 | 3,581 | | 1969 | 3,512 | | 1968 | 3,444 | | 1967 | 3,375 | | 1966 | 3,310 | | 1965 | 3,246 | | 1964 | 3,180 | | 1963 | 3,112 | | 1962 | 3,042 | | 1961 | 2,974 | | 1960 | 2,906 |
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