Year | Value | 2022 | 43,629 | 2021 | 42,434 | 2020 | 41,502 | 2019 | 41,059 | 2018 | 41,113 | 2017 | 41,758 | 2016 | 42,927 | 2015 | 44,441 | 2014 | 46,012 | 2013 | 47,352 | 2012 | 48,202 | 2011 | 48,392 | 2010 | 47,987 | 2009 | 47,131 | 2008 | 46,096 | 2007 | 45,022 | 2006 | 44,019 | 2005 | 43,045 | 2004 | 41,940 | 2003 | 40,845 | 2002 | 39,836 | 2001 | 38,951 | 2000 | 38,145 | 1999 | 37,210 | 1998 | 35,795 | 1997 | 33,997 | 1996 | 31,799 | 1995 | 29,655 | 1994 | 27,902 | 1993 | 26,293 | 1992 | 24,839 | 1991 | 23,498 | 1990 | 22,328 | 1989 | 21,272 | 1988 | 20,439 | 1987 | 20,056 | 1986 | 19,967 | 1985 | 19,938 | 1984 | 19,858 | 1983 | 19,667 | 1982 | 19,335 | 1981 | 18,787 | 1980 | 18,218 | 1979 | 17,775 | 1978 | 17,574 | 1977 | 17,771 | 1976 | 18,151 | 1975 | 18,554 | 1974 | 18,790 | 1973 | 18,754 | 1972 | 18,423 | 1971 | 17,822 | 1970 | 16,995 | 1969 | 16,057 | 1968 | 15,155 | 1967 | 14,394 | 1966 | 13,833 | 1965 | 13,492 | 1964 | 13,318 | 1963 | 13,201 | 1962 | 13,026 | 1961 | 12,685 | 1960 | 12,504 |
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