Year | Value | 2022 | 51,386 | 2021 | 50,170 | 2020 | 48,946 | 2019 | 47,696 | 2018 | 46,502 | 2017 | 45,458 | 2016 | 44,615 | 2015 | 43,983 | 2014 | 43,511 | 2013 | 43,107 | 2012 | 42,673 | 2011 | 42,123 | 2010 | 41,213 | 2009 | 40,047 | 2008 | 38,972 | 2007 | 38,039 | 2006 | 37,256 | 2005 | 36,582 | 2004 | 35,955 | 2003 | 35,312 | 2002 | 34,604 | 2001 | 33,791 | 2000 | 32,840 | 1999 | 31,773 | 1998 | 30,669 | 1997 | 29,628 | 1996 | 28,732 | 1995 | 28,005 | 1994 | 27,412 | 1993 | 26,886 | 1992 | 26,430 | 1991 | 26,010 | 1990 | 25,513 | 1989 | 24,917 | 1988 | 24,250 | 1987 | 23,539 | 1986 | 22,814 | 1985 | 22,109 | 1984 | 21,440 | 1983 | 20,804 | 1982 | 20,140 | 1981 | 19,415 | 1980 | 18,746 | 1979 | 18,256 | 1978 | 17,972 | 1977 | 17,887 | 1976 | 17,961 | 1975 | 18,159 | 1974 | 18,459 | 1973 | 18,653 | 1972 | 18,707 | 1971 | 18,699 | 1970 | 18,524 | 1969 | 18,105 | 1968 | 17,456 | 1967 | 16,674 | 1966 | 15,956 | 1965 | 15,554 | 1964 | 15,609 | 1963 | 16,068 | 1962 | 16,732 | 1961 | 17,309 | 1960 | 17,321 |
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