Year | Value | 2022 | 21,784 | 2021 | 21,628 | 2020 | 21,372 | 2019 | 21,103 | 2018 | 20,682 | 2017 | 20,179 | 2016 | 19,815 | 2015 | 19,453 | 2014 | 19,085 | 2013 | 18,694 | 2012 | 18,286 | 2011 | 17,895 | 2010 | 17,480 | 2009 | 16,992 | 2008 | 16,455 | 2007 | 15,905 | 2006 | 15,382 | 2005 | 14,905 | 2004 | 14,466 | 2003 | 14,054 | 2002 | 13,679 | 2001 | 13,319 | 2000 | 12,924 | 1999 | 12,499 | 1998 | 12,070 | 1997 | 11,663 | 1996 | 11,306 | 1995 | 11,019 | 1994 | 10,805 | 1993 | 10,653 | 1992 | 10,566 | 1991 | 10,530 | 1990 | 10,566 | 1989 | 10,668 | 1988 | 10,775 | 1987 | 10,865 | 1986 | 10,919 | 1985 | 10,932 | 1984 | 10,919 | 1983 | 10,897 | 1982 | 10,881 | 1981 | 10,867 | 1980 | 10,856 | 1979 | 10,854 | 1978 | 10,850 | 1977 | 10,832 | 1976 | 10,782 | 1975 | 10,679 | 1974 | 10,509 | 1973 | 10,288 | 1972 | 10,052 | 1971 | 9,841 | 1970 | 9,709 | 1969 | 9,682 | 1968 | 9,738 | 1967 | 9,826 | 1966 | 9,894 | 1965 | 9,882 | 1964 | 9,750 | 1963 | 9,509 | 1962 | 9,204 | 1961 | 8,892 | 1960 | 8,664 |
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