| Year | Value | | 2022 | 4,159 | | 2021 | 4,036 | | 2020 | 3,886 | | 2019 | 3,697 | | 2018 | 3,502 | | 2017 | 3,313 | | 2016 | 3,151 | | 2015 | 3,021 | | 2014 | 2,906 | | 2013 | 2,807 | | 2012 | 2,730 | | 2011 | 2,674 | | 2010 | 2,642 | | 2009 | 2,634 | | 2008 | 2,643 | | 2007 | 2,612 | | 2006 | 2,541 | | 2005 | 2,483 | | 2004 | 2,427 | | 2003 | 2,368 | | 2002 | 2,313 | | 2001 | 2,250 | | 2000 | 2,167 | | 1999 | 2,066 | | 1998 | 1,953 | | 1997 | 1,829 | | 1996 | 1,747 | | 1995 | 1,716 | | 1994 | 1,685 | | 1993 | 1,653 | | 1992 | 1,622 | | 1991 | 1,590 | | 1990 | 1,561 | | 1989 | 1,538 | | 1988 | 1,513 | | 1987 | 1,486 | | 1986 | 1,412 | | 1985 | 1,319 | | 1984 | 1,265 | | 1983 | 1,225 | | 1982 | 1,198 | | 1981 | 1,181 | | 1980 | 1,169 | | 1979 | 1,149 | | 1978 | 1,133 | | 1977 | 1,126 | | 1976 | 1,103 | | 1975 | 1,056 | | 1974 | 1,001 | | 1973 | 949 | | 1972 | 900 | | 1971 | 852 | | 1970 | 810 | | 1969 | 776 | | 1968 | 747 | | 1967 | 725 | | 1966 | 664 | | 1965 | 597 | | 1964 | 575 | | 1963 | 565 | | 1962 | 557 | | 1961 | 551 | | 1960 | 546 |
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