Year | Value | 2022 | 45,552 | 2021 | 45,125 | 2020 | 45,625 | 2019 | 46,848 | 2018 | 48,250 | 2017 | 49,632 | 2016 | 50,859 | 2015 | 51,511 | 2014 | 51,597 | 2013 | 51,083 | 2012 | 49,931 | 2011 | 48,446 | 2010 | 47,131 | 2009 | 46,301 | 2008 | 45,671 | 2007 | 44,833 | 2006 | 43,750 | 2005 | 42,319 | 2004 | 40,378 | 2003 | 38,308 | 2002 | 36,475 | 2001 | 34,736 | 2000 | 32,972 | 1999 | 31,245 | 1998 | 29,627 | 1997 | 28,125 | 1996 | 26,743 | 1995 | 25,464 | 1994 | 24,285 | 1993 | 23,251 | 1992 | 22,376 | 1991 | 21,637 | 1990 | 21,078 | 1989 | 20,712 | 1988 | 20,481 | 1987 | 20,324 | 1986 | 20,202 | 1985 | 20,094 | 1984 | 20,010 | 1983 | 19,956 | 1982 | 19,926 | 1981 | 19,933 | 1980 | 19,931 | 1979 | 19,842 | 1978 | 19,661 | 1977 | 19,449 | 1976 | 19,215 | 1975 | 18,966 | 1974 | 18,729 | 1973 | 18,495 | 1972 | 18,256 | 1971 | 17,985 | 1970 | 17,686 | 1969 | 17,426 | 1968 | 17,221 | 1967 | 17,027 | 1966 | 16,834 | 1965 | 16,631 | 1964 | 16,406 | 1963 | 16,138 | 1962 | 15,811 | 1961 | 15,427 | 1960 | 15,018 |
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