Year | Value | 2022 | 38,604 | 2021 | 39,257 | 2020 | 40,255 | 2019 | 41,239 | 2018 | 42,203 | 2017 | 43,117 | 2016 | 43,990 | 2015 | 44,812 | 2014 | 45,579 | 2013 | 46,290 | 2012 | 46,937 | 2011 | 47,522 | 2010 | 48,044 | 2009 | 48,554 | 2008 | 49,072 | 2007 | 49,561 | 2006 | 50,017 | 2005 | 50,441 | 2004 | 50,825 | 2003 | 51,160 | 2002 | 51,425 | 2001 | 51,611 | 2000 | 51,584 | 1999 | 50,758 | 1998 | 49,509 | 1997 | 48,226 | 1996 | 46,893 | 1995 | 45,540 | 1994 | 44,176 | 1993 | 42,809 | 1992 | 41,459 | 1991 | 40,118 | 1990 | 38,708 | 1989 | 37,152 | 1988 | 35,474 | 1987 | 33,862 | 1986 | 32,321 | 1985 | 30,843 | 1984 | 29,429 | 1983 | 28,076 | 1982 | 26,788 | 1981 | 25,559 | 1980 | 24,444 | 1979 | 23,672 | 1978 | 23,099 | 1977 | 22,533 | 1976 | 21,966 | 1975 | 21,397 | 1974 | 20,879 | 1973 | 20,420 | 1972 | 19,976 | 1971 | 19,531 | 1970 | 19,056 | 1969 | 18,472 | 1968 | 17,817 | 1967 | 17,186 | 1966 | 16,584 | 1965 | 15,984 | 1964 | 15,387 | 1963 | 14,814 | 1962 | 14,267 | 1961 | 13,745 | 1960 | 13,298 |
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