| Year | Value | | 2022 | 8,394 | | 2021 | 8,120 | | 2020 | 7,810 | | 2019 | 7,441 | | 2018 | 7,039 | | 2017 | 6,652 | | 2016 | 6,338 | | 2015 | 6,071 | | 2014 | 5,872 | | 2013 | 5,664 | | 2012 | 5,417 | | 2011 | 5,199 | | 2010 | 4,955 | | 2009 | 4,726 | | 2008 | 4,446 | | 2007 | 4,154 | | 2006 | 4,044 | | 2005 | 3,981 | | 2004 | 3,874 | | 2003 | 3,550 | | 2002 | 3,210 | | 2001 | 2,947 | | 2000 | 2,724 | | 1999 | 2,673 | | 1998 | 2,647 | | 1997 | 2,660 | | 1996 | 2,780 | | 1995 | 2,494 | | 1994 | 2,103 | | 1993 | 1,959 | | 1992 | 1,791 | | 1991 | 1,851 | | 1990 | 1,894 | | 1989 | 1,823 | | 1988 | 1,751 | | 1987 | 1,684 | | 1986 | 1,624 | | 1985 | 1,563 | | 1984 | 1,510 | | 1983 | 1,462 | | 1982 | 1,418 | | 1981 | 1,377 | | 1980 | 1,337 | | 1979 | 1,299 | | 1978 | 1,264 | | 1977 | 1,230 | | 1976 | 1,199 | | 1975 | 1,173 | | 1974 | 1,149 | | 1973 | 1,125 | | 1972 | 1,106 | | 1971 | 1,089 | | 1970 | 1,072 | | 1969 | 1,058 | | 1968 | 1,042 | | 1967 | 1,023 | | 1966 | 1,002 | | 1965 | 983 | | 1964 | 963 | | 1963 | 946 | | 1962 | 931 | | 1961 | 918 | | 1960 | 907 |
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