| Year | Value | | 2022 | 2,008 | | 2021 | 1,541 | | 2020 | 1,428 | | 2019 | 1,336 | | 2018 | 1,251 | | 2017 | 1,175 | | 2016 | 1,116 | | 2015 | 1,067 | | 2014 | 1,019 | | 2013 | 997 | | 2012 | 986 | | 2011 | 980 | | 2010 | 1,004 | | 2009 | 980 | | 2008 | 986 | | 2007 | 983 | | 2006 | 1,010 | | 2005 | 1,023 | | 2004 | 1,042 | | 2003 | 1,058 | | 2002 | 1,080 | | 2001 | 1,055 | | 2000 | 1,065 | | 1999 | 1,075 | | 1998 | 1,076 | | 1997 | 1,072 | | 1996 | 1,059 | | 1995 | 1,026 | | 1994 | 994 | | 1993 | 956 | | 1992 | 927 | | 1991 | 916 | | 1990 | 896 | | 1989 | 888 | | 1988 | 882 | | 1987 | 870 | | 1986 | 823 | | 1985 | 807 | | 1984 | 788 | | 1983 | 771 | | 1982 | 764 | | 1981 | 753 | | 1980 | 742 | | 1979 | 739 | | 1978 | 738 | | 1977 | 747 | | 1976 | 747 | | 1975 | 741 | | 1974 | 732 | | 1973 | 725 | | 1972 | 720 | | 1971 | 710 | | 1970 | 699 | | 1969 | 677 | | 1968 | 651 | | 1967 | 626 | | 1966 | 602 | | 1965 | 583 | | 1964 | 568 | | 1963 | 553 | | 1962 | 541 | | 1961 | 530 | | 1960 | 520 |
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