Year | Value | 2022 | 41,062 | 2021 | 38,998 | 2020 | 37,581 | 2019 | 36,309 | 2018 | 35,400 | 2017 | 34,865 | 2016 | 34,426 | 2015 | 34,281 | 2014 | 34,475 | 2013 | 34,886 | 2012 | 35,458 | 2011 | 36,075 | 2010 | 36,705 | 2009 | 37,301 | 2008 | 37,829 | 2007 | 38,276 | 2006 | 38,656 | 2005 | 38,979 | 2004 | 39,240 | 2003 | 39,410 | 2002 | 39,435 | 2001 | 39,421 | 2000 | 39,397 | 1999 | 39,300 | 1998 | 39,127 | 1997 | 39,061 | 1996 | 39,002 | 1995 | 39,001 | 1994 | 38,947 | 1993 | 38,550 | 1992 | 38,024 | 1991 | 37,427 | 1990 | 36,781 | 1989 | 36,048 | 1988 | 35,203 | 1987 | 34,262 | 1986 | 33,299 | 1985 | 32,349 | 1984 | 31,433 | 1983 | 30,573 | 1982 | 29,733 | 1981 | 28,905 | 1980 | 28,129 | 1979 | 27,339 | 1978 | 26,451 | 1977 | 25,491 | 1976 | 24,524 | 1975 | 23,587 | 1974 | 22,680 | 1973 | 21,583 | 1972 | 20,267 | 1971 | 18,869 | 1970 | 17,301 | 1969 | 15,767 | 1968 | 14,747 | 1967 | 14,311 | 1966 | 14,210 | 1965 | 14,344 | 1964 | 14,586 | 1963 | 14,831 | 1962 | 15,083 | 1961 | 15,343 | 1960 | 15,609 |
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