Year | Value | 2022 | 31,775 | 2021 | 30,977 | 2020 | 30,257 | 2019 | 29,287 | 2018 | 28,412 | 2017 | 28,002 | 2016 | 27,863 | 2015 | 27,980 | 2014 | 28,543 | 2013 | 29,082 | 2012 | 29,180 | 2011 | 28,845 | 2010 | 28,271 | 2009 | 27,774 | 2008 | 27,173 | 2007 | 26,297 | 2006 | 25,165 | 2005 | 23,891 | 2004 | 22,879 | 2003 | 22,616 | 2002 | 22,423 | 2001 | 21,783 | 2000 | 21,046 | 1999 | 20,145 | 1998 | 18,896 | 1997 | 16,891 | 1996 | 15,451 | 1995 | 14,876 | 1994 | 14,643 | 1993 | 14,625 | 1992 | 14,015 | 1991 | 13,176 | 1990 | 15,067 | 1989 | 17,137 | 1988 | 16,572 | 1987 | 15,998 | 1986 | 15,439 | 1985 | 14,919 | 1984 | 14,416 | 1983 | 14,145 | 1982 | 13,946 | 1981 | 13,607 | 1980 | 13,318 | 1979 | 13,068 | 1978 | 12,835 | 1977 | 12,615 | 1976 | 12,426 | 1975 | 12,276 | 1974 | 12,036 | 1973 | 11,697 | 1972 | 11,377 | 1971 | 11,062 | 1970 | 10,743 | 1969 | 10,424 | 1968 | 10,107 | 1967 | 9,790 | 1966 | 9,487 | 1965 | 9,208 | 1964 | 8,948 | 1963 | 8,702 | 1962 | 8,486 | 1961 | 8,284 | 1960 | 8,074 |
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