Year | Value | 2022 | 28,646 | 2021 | 27,540 | 2020 | 26,670 | 2019 | 26,068 | 2018 | 25,707 | 2017 | 25,539 | 2016 | 25,487 | 2015 | 25,444 | 2014 | 25,252 | 2013 | 24,841 | 2012 | 24,271 | 2011 | 23,605 | 2010 | 22,941 | 2009 | 22,358 | 2008 | 21,969 | 2007 | 21,935 | 2006 | 22,297 | 2005 | 22,894 | 2004 | 23,266 | 2003 | 23,014 | 2002 | 22,295 | 2001 | 21,469 | 2000 | 20,765 | 1999 | 20,319 | 1998 | 20,100 | 1997 | 19,958 | 1996 | 19,738 | 1995 | 19,366 | 1994 | 18,838 | 1993 | 18,237 | 1992 | 17,693 | 1991 | 17,299 | 1990 | 17,031 | 1989 | 16,804 | 1988 | 16,593 | 1987 | 16,405 | 1986 | 16,244 | 1985 | 16,113 | 1984 | 16,020 | 1983 | 15,975 | 1982 | 15,972 | 1981 | 15,998 | 1980 | 15,999 | 1979 | 15,910 | 1978 | 15,654 | 1977 | 15,203 | 1976 | 14,668 | 1975 | 14,219 | 1974 | 13,934 | 1973 | 13,797 | 1972 | 13,751 | 1971 | 13,694 | 1970 | 13,529 | 1969 | 13,266 | 1968 | 12,923 | 1967 | 12,513 | 1966 | 12,129 | 1965 | 11,833 | 1964 | 11,610 | 1963 | 11,450 | 1962 | 11,334 | 1961 | 11,179 | 1960 | 10,938 |
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