| Year | Value | | 2022 | 2,747 | | 2021 | 2,631 | | 2020 | 2,503 | | 2019 | 2,379 | | 2018 | 2,271 | | 2017 | 2,173 | | 2016 | 2,090 | | 2015 | 2,023 | | 2014 | 1,971 | | 2013 | 1,930 | | 2012 | 1,895 | | 2011 | 1,866 | | 2010 | 1,832 | | 2009 | 1,778 | | 2008 | 1,707 | | 2007 | 1,640 | | 2006 | 1,584 | | 2005 | 1,544 | | 2004 | 1,511 | | 2003 | 1,477 | | 2002 | 1,447 | | 2001 | 1,422 | | 2000 | 1,392 | | 1999 | 1,352 | | 1998 | 1,292 | | 1997 | 1,208 | | 1996 | 1,120 | | 1995 | 1,050 | | 1994 | 1,011 | | 1993 | 1,001 | | 1992 | 1,008 | | 1991 | 1,001 | | 1990 | 968 | | 1989 | 933 | | 1988 | 914 | | 1987 | 910 | | 1986 | 916 | | 1985 | 924 | | 1984 | 926 | | 1983 | 920 | | 1982 | 901 | | 1981 | 875 | | 1980 | 853 | | 1979 | 835 | | 1978 | 816 | | 1977 | 801 | | 1976 | 788 | | 1975 | 775 | | 1974 | 766 | | 1973 | 761 | | 1972 | 750 | | 1971 | 730 | | 1970 | 704 | | 1969 | 676 | | 1968 | 648 | | 1967 | 621 | | 1966 | 599 | | 1965 | 583 | | 1964 | 567 | | 1963 | 552 | | 1962 | 536 | | 1961 | 526 | | 1960 | 516 |
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