| Year | Value | | 2022 | 2,936 | | 2021 | 3,033 | | 2020 | 3,152 | | 2019 | 3,232 | | 2018 | 3,243 | | 2017 | 3,174 | | 2016 | 3,039 | | 2015 | 2,866 | | 2014 | 2,692 | | 2013 | 2,569 | | 2012 | 2,537 | | 2011 | 2,592 | | 2010 | 2,694 | | 2009 | 2,787 | | 2008 | 2,800 | | 2007 | 2,691 | | 2006 | 2,484 | | 2005 | 2,238 | | 2004 | 2,016 | | 2003 | 1,875 | | 2002 | 1,835 | | 2001 | 1,857 | | 2000 | 1,885 | | 1999 | 1,885 | | 1998 | 1,863 | | 1997 | 1,836 | | 1996 | 1,811 | | 1995 | 1,784 | | 1994 | 1,753 | | 1993 | 1,722 | | 1992 | 1,690 | | 1991 | 1,657 | | 1990 | 1,629 | | 1989 | 1,609 | | 1988 | 1,591 | | 1987 | 1,566 | | 1986 | 1,536 | | 1985 | 1,502 | | 1984 | 1,464 | | 1983 | 1,421 | | 1982 | 1,370 | | 1981 | 1,312 | | 1980 | 1,246 | | 1979 | 1,171 | | 1978 | 1,090 | | 1977 | 1,013 | | 1976 | 944 | | 1975 | 880 | | 1974 | 824 | | 1973 | 775 | | 1972 | 734 | | 1971 | 700 | | 1970 | 672 | | 1969 | 650 | | 1968 | 632 | | 1967 | 616 | | 1966 | 600 | | 1965 | 584 | | 1964 | 571 | | 1963 | 559 | | 1962 | 548 | | 1961 | 538 | | 1960 | 528 |
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