| Year | Value | | 2022 | 58,841 | | 2021 | 58,180 | | 2020 | 57,729 | | 2019 | 57,165 | | 2018 | 56,190 | | 2017 | 54,665 | | 2016 | 52,799 | | 2015 | 50,898 | | 2014 | 49,159 | | 2013 | 47,661 | | 2012 | 46,523 | | 2011 | 45,779 | | 2010 | 45,261 | | 2009 | 44,801 | | 2008 | 44,229 | | 2007 | 43,328 | | 2006 | 41,679 | | 2005 | 39,495 | | 2004 | 37,383 | | 2003 | 35,484 | | 2002 | 33,895 | | 2001 | 32,544 | | 2000 | 31,229 | | 1999 | 29,828 | | 1998 | 28,296 | | 1997 | 26,605 | | 1996 | 24,828 | | 1995 | 23,129 | | 1994 | 21,583 | | 1993 | 20,156 | | 1992 | 18,991 | | 1991 | 18,081 | | 1990 | 17,255 | | 1989 | 16,516 | | 1988 | 15,875 | | 1987 | 15,378 | | 1986 | 14,988 | | 1985 | 14,579 | | 1984 | 14,128 | | 1983 | 13,670 | | 1982 | 13,225 | | 1981 | 12,884 | | 1980 | 12,667 | | 1979 | 12,411 | | 1978 | 12,093 | | 1977 | 11,810 | | 1976 | 11,586 | | 1975 | 11,402 | | 1974 | 11,221 | | 1973 | 11,017 | | 1972 | 10,797 | | 1971 | 10,587 | | 1970 | 10,451 | | 1969 | 10,423 | | 1968 | 10,440 | | 1967 | 10,429 | | 1966 | 10,346 | | 1965 | 10,169 | | 1964 | 9,906 | | 1963 | 9,580 | | 1962 | 9,212 | | 1961 | 8,963 | | 1960 | 8,857 |
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