Year | Value | 2022 | 951 | 2021 | 959 | 2020 | 968 | 2019 | 977 | 2018 | 987 | 2017 | 996 | 2016 | 1,002 | 2015 | 999 | 2014 | 990 | 2013 | 973 | 2012 | 951 | 2011 | 927 | 2010 | 900 | 2009 | 873 | 2008 | 847 | 2007 | 821 | 2006 | 797 | 2005 | 776 | 2004 | 753 | 2003 | 728 | 2002 | 702 | 2001 | 683 | 2000 | 672 | 1999 | 663 | 1998 | 657 | 1997 | 651 | 1996 | 643 | 1995 | 632 | 1994 | 623 | 1993 | 615 | 1992 | 605 | 1991 | 599 | 1990 | 603 | 1989 | 610 | 1988 | 611 | 1987 | 606 | 1986 | 599 | 1985 | 589 | 1984 | 573 | 1983 | 553 | 1982 | 532 | 1981 | 505 | 1980 | 477 | 1979 | 452 | 1978 | 425 | 1977 | 400 | 1976 | 375 | 1975 | 348 | 1974 | 320 | 1973 | 292 | 1972 | 266 | 1971 | 242 | 1970 | 222 | 1969 | 210 | 1968 | 204 | 1967 | 202 | 1966 | 202 | 1965 | 203 | 1964 | 207 | 1963 | 210 | 1962 | 215 | 1961 | 221 | 1960 | 229 |
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