| Year | Value | | 2022 | 3,743 | | 2021 | 3,709 | | 2020 | 3,676 | | 2019 | 3,537 | | 2018 | 3,605 | | 2017 | 3,755 | | 2016 | 3,616 | | 2015 | 3,457 | | 2014 | 3,293 | | 2013 | 3,135 | | 2012 | 2,991 | | 2011 | 2,865 | | 2010 | 2,740 | | 2009 | 2,646 | | 2008 | 2,587 | | 2007 | 2,518 | | 2006 | 2,425 | | 2005 | 2,316 | | 2004 | 2,202 | | 2003 | 2,102 | | 2002 | 2,002 | | 2001 | 1,940 | | 2000 | 1,936 | | 1999 | 1,933 | | 1998 | 1,926 | | 1997 | 1,893 | | 1996 | 1,831 | | 1995 | 1,771 | | 1994 | 1,727 | | 1993 | 1,685 | | 1992 | 1,637 | | 1991 | 1,591 | | 1990 | 1,541 | | 1989 | 1,499 | | 1988 | 1,478 | | 1987 | 1,479 | | 1986 | 1,500 | | 1985 | 1,530 | | 1984 | 1,562 | | 1983 | 1,590 | | 1982 | 1,591 | | 1981 | 1,558 | | 1980 | 1,510 | | 1979 | 1,448 | | 1978 | 1,384 | | 1977 | 1,338 | | 1976 | 1,306 | | 1975 | 1,290 | | 1974 | 1,285 | | 1973 | 1,285 | | 1972 | 1,301 | | 1971 | 1,299 | | 1970 | 1,272 | | 1969 | 1,242 | | 1968 | 1,202 | | 1967 | 1,161 | | 1966 | 1,125 | | 1965 | 1,092 | | 1964 | 1,060 | | 1963 | 1,035 | | 1962 | 1,012 | | 1961 | 993 | | 1960 | 985 |
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