| Year | Value | | 2022 | 49,114 | | 2021 | 43,821 | | 2020 | 42,648 | | 2019 | 40,399 | | 2018 | 38,583 | | 2017 | 37,877 | | 2016 | 37,705 | | 2015 | 37,188 | | 2014 | 36,742 | | 2013 | 35,939 | | 2012 | 34,287 | | 2011 | 31,839 | | 2010 | 29,546 | | 2009 | 27,849 | | 2008 | 26,368 | | 2007 | 24,639 | | 2006 | 23,376 | | 2005 | 22,413 | | 2004 | 21,713 | | 2003 | 21,231 | | 2002 | 21,059 | | 2001 | 20,067 | | 2000 | 18,575 | | 1999 | 17,461 | | 1998 | 16,906 | | 1997 | 16,213 | | 1996 | 15,707 | | 1995 | 15,197 | | 1994 | 14,912 | | 1993 | 14,671 | | 1992 | 14,549 | | 1991 | 14,359 | | 1990 | 14,155 | | 1989 | 13,697 | | 1988 | 13,250 | | 1987 | 12,759 | | 1986 | 12,306 | | 1985 | 11,884 | | 1984 | 11,206 | | 1983 | 10,281 | | 1982 | 9,542 | | 1981 | 8,700 | | 1980 | 7,999 | | 1979 | 7,578 | | 1978 | 7,007 | | 1977 | 6,376 | | 1976 | 5,776 | | 1975 | 5,218 | | 1974 | 4,756 | | 1973 | 4,391 | | 1972 | 4,100 | | 1971 | 3,890 | | 1970 | 3,711 | | 1969 | 3,381 | | 1968 | 2,921 | | 1967 | 2,543 | | 1966 | 2,249 | | 1965 | 2,016 | | 1964 | 1,820 | | 1963 | 1,646 | | 1962 | 1,494 | | 1961 | 1,367 | | 1960 | 1,257 |
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