| Year | Value | | 2022 | 3,130 | | 2021 | 3,234 | | 2020 | 3,377 | | 2019 | 3,552 | | 2018 | 3,770 | | 2017 | 4,010 | | 2016 | 4,250 | | 2015 | 4,480 | | 2014 | 4,657 | | 2013 | 4,743 | | 2012 | 4,769 | | 2011 | 4,759 | | 2010 | 4,720 | | 2009 | 4,605 | | 2008 | 4,408 | | 2007 | 4,184 | | 2006 | 3,927 | | 2005 | 3,652 | | 2004 | 3,372 | | 2003 | 3,094 | | 2002 | 2,834 | | 2001 | 2,604 | | 2000 | 2,407 | | 1999 | 2,275 | | 1998 | 2,203 | | 1997 | 2,150 | | 1996 | 2,115 | | 1995 | 2,094 | | 1994 | 2,085 | | 1993 | 2,079 | | 1992 | 2,076 | | 1991 | 2,076 | | 1990 | 2,076 | | 1989 | 2,074 | | 1988 | 2,067 | | 1987 | 2,060 | | 1986 | 2,054 | | 1985 | 2,047 | | 1984 | 2,037 | | 1983 | 2,020 | | 1982 | 1,995 | | 1981 | 1,960 | | 1980 | 1,917 | | 1979 | 1,870 | | 1978 | 1,819 | | 1977 | 1,764 | | 1976 | 1,710 | | 1975 | 1,658 | | 1974 | 1,606 | | 1973 | 1,558 | | 1972 | 1,514 | | 1971 | 1,472 | | 1970 | 1,430 | | 1969 | 1,389 | | 1968 | 1,347 | | 1967 | 1,303 | | 1966 | 1,260 | | 1965 | 1,214 | | 1964 | 1,165 | | 1963 | 1,118 | | 1962 | 1,073 | | 1961 | 1,028 | | 1960 | 990 |
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