| Year | Value | | 2022 | 3,506 | | 2021 | 2,913 | | 2020 | 2,910 | | 2019 | 2,891 | | 2018 | 2,837 | | 2017 | 2,760 | | 2016 | 2,656 | | 2015 | 2,515 | | 2014 | 2,326 | | 2013 | 2,147 | | 2012 | 1,964 | | 2011 | 1,813 | | 2010 | 1,749 | | 2009 | 1,618 | | 2008 | 1,551 | | 2007 | 1,461 | | 2006 | 1,402 | | 2005 | 1,334 | | 2004 | 1,300 | | 2003 | 1,279 | | 2002 | 1,265 | | 2001 | 1,190 | | 2000 | 1,149 | | 1999 | 1,100 | | 1998 | 1,042 | | 1997 | 1,017 | | 1996 | 1,028 | | 1995 | 1,034 | | 1994 | 1,050 | | 1993 | 1,053 | | 1992 | 1,055 | | 1991 | 1,071 | | 1990 | 1,071 | | 1989 | 1,075 | | 1988 | 1,069 | | 1987 | 1,062 | | 1986 | 1,013 | | 1985 | 998 | | 1984 | 983 | | 1983 | 969 | | 1982 | 958 | | 1981 | 941 | | 1980 | 922 | | 1979 | 906 | | 1978 | 890 | | 1977 | 887 | | 1976 | 879 | | 1975 | 869 | | 1974 | 858 | | 1973 | 856 | | 1972 | 855 | | 1971 | 842 | | 1970 | 830 | | 1969 | 818 | | 1968 | 807 | | 1967 | 801 | | 1966 | 797 | | 1965 | 795 | | 1964 | 791 | | 1963 | 781 | | 1962 | 765 | | 1961 | 742 | | 1960 | 715 |
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