| Year | Value | | 2022 | 2,915 | | 2021 | 2,313 | | 2020 | 2,189 | | 2019 | 2,059 | | 2018 | 1,931 | | 2017 | 1,793 | | 2016 | 1,642 | | 2015 | 1,510 | | 2014 | 1,394 | | 2013 | 1,298 | | 2012 | 1,212 | | 2011 | 1,157 | | 2010 | 1,156 | | 2009 | 1,100 | | 2008 | 1,092 | | 2007 | 1,077 | | 2006 | 1,074 | | 2005 | 1,049 | | 2004 | 1,048 | | 2003 | 1,062 | | 2002 | 1,099 | | 2001 | 1,109 | | 2000 | 1,155 | | 1999 | 1,179 | | 1998 | 1,176 | | 1997 | 1,201 | | 1996 | 1,226 | | 1995 | 1,204 | | 1994 | 1,185 | | 1993 | 1,147 | | 1992 | 1,104 | | 1991 | 1,081 | | 1990 | 1,052 | | 1989 | 1,030 | | 1988 | 1,015 | | 1987 | 1,008 | | 1986 | 960 | | 1985 | 944 | | 1984 | 929 | | 1983 | 916 | | 1982 | 905 | | 1981 | 890 | | 1980 | 873 | | 1979 | 857 | | 1978 | 843 | | 1977 | 847 | | 1976 | 844 | | 1975 | 838 | | 1974 | 837 | | 1973 | 843 | | 1972 | 840 | | 1971 | 823 | | 1970 | 815 | | 1969 | 806 | | 1968 | 795 | | 1967 | 782 | | 1966 | 768 | | 1965 | 749 | | 1964 | 727 | | 1963 | 704 | | 1962 | 682 | | 1961 | 662 | | 1960 | 647 |
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