| Year | Value | | 2022 | 9,961 | | 2021 | 9,606 | | 2020 | 9,154 | | 2019 | 8,626 | | 2018 | 8,087 | | 2017 | 7,602 | | 2016 | 7,254 | | 2015 | 7,055 | | 2014 | 6,948 | | 2013 | 6,875 | | 2012 | 6,795 | | 2011 | 6,703 | | 2010 | 6,605 | | 2009 | 6,503 | | 2008 | 6,375 | | 2007 | 6,172 | | 2006 | 5,908 | | 2005 | 5,663 | | 2004 | 5,497 | | 2003 | 5,391 | | 2002 | 5,317 | | 2001 | 5,232 | | 2000 | 5,075 | | 1999 | 4,845 | | 1998 | 4,571 | | 1997 | 4,289 | | 1996 | 4,027 | | 1995 | 3,797 | | 1994 | 3,640 | | 1993 | 3,560 | | 1992 | 3,490 | | 1991 | 3,408 | | 1990 | 3,321 | | 1989 | 3,207 | | 1988 | 3,067 | | 1987 | 2,931 | | 1986 | 2,807 | | 1985 | 2,695 | | 1984 | 2,613 | | 1983 | 2,569 | | 1982 | 2,561 | | 1981 | 2,585 | | 1980 | 2,642 | | 1979 | 2,734 | | 1978 | 2,848 | | 1977 | 2,960 | | 1976 | 3,044 | | 1975 | 3,086 | | 1974 | 3,083 | | 1973 | 3,045 | | 1972 | 2,997 | | 1971 | 2,950 | | 1970 | 2,909 | | 1969 | 2,883 | | 1968 | 2,890 | | 1967 | 2,950 | | 1966 | 3,062 | | 1965 | 3,221 | | 1964 | 3,334 | | 1963 | 3,126 | | 1962 | 2,650 | | 1961 | 2,335 | | 1960 | 2,215 |
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