| Year | Value | | 2022 | 1,239 | | 2021 | 1,230 | | 2020 | 1,199 | | 2019 | 1,164 | | 2018 | 1,139 | | 2017 | 1,119 | | 2016 | 1,125 | | 2015 | 1,164 | | 2014 | 1,180 | | 2013 | 1,171 | | 2012 | 1,172 | | 2011 | 1,153 | | 2010 | 1,118 | | 2009 | 1,128 | | 2008 | 1,157 | | 2007 | 1,160 | | 2006 | 1,144 | | 2005 | 1,122 | | 2004 | 1,098 | | 2003 | 1,075 | | 2002 | 1,064 | | 2001 | 1,065 | | 2000 | 1,070 | | 1999 | 1,066 | | 1998 | 1,050 | | 1997 | 1,025 | | 1996 | 995 | | 1995 | 974 | | 1994 | 955 | | 1993 | 932 | | 1992 | 905 | | 1991 | 883 | | 1990 | 861 | | 1989 | 847 | | 1988 | 843 | | 1987 | 830 | | 1986 | 806 | | 1985 | 775 | | 1984 | 737 | | 1983 | 707 | | 1982 | 687 | | 1981 | 669 | | 1980 | 652 | | 1979 | 632 | | 1978 | 611 | | 1977 | 589 | | 1976 | 576 | | 1975 | 571 | | 1974 | 566 | | 1973 | 560 | | 1972 | 555 | | 1971 | 548 | | 1970 | 540 | | 1969 | 532 | | 1968 | 523 | | 1967 | 512 | | 1966 | 499 | | 1965 | 482 | | 1964 | 466 | | 1963 | 450 | | 1962 | 433 | | 1961 | 420 | | 1960 | 407 |
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