Year | Value | 2022 | 50,173 | 2021 | 49,784 | 2020 | 49,488 | 2019 | 50,250 | 2018 | 49,728 | 2017 | 48,189 | 2016 | 48,003 | 2015 | 48,085 | 2014 | 48,507 | 2013 | 49,350 | 2012 | 50,631 | 2011 | 52,221 | 2010 | 54,011 | 2009 | 56,065 | 2008 | 58,489 | 2007 | 61,253 | 2006 | 64,270 | 2005 | 67,379 | 2004 | 70,046 | 2003 | 72,073 | 2002 | 73,527 | 2001 | 74,266 | 2000 | 74,207 | 1999 | 73,577 | 1998 | 72,363 | 1997 | 70,385 | 1996 | 67,961 | 1995 | 65,515 | 1994 | 63,342 | 1993 | 61,659 | 1992 | 60,563 | 1991 | 59,674 | 1990 | 58,642 | 1989 | 57,487 | 1988 | 56,337 | 1987 | 55,352 | 1986 | 54,913 | 1985 | 55,534 | 1984 | 57,474 | 1983 | 60,406 | 1982 | 63,648 | 1981 | 66,509 | 1980 | 68,287 | 1979 | 68,613 | 1978 | 67,532 | 1977 | 65,524 | 1976 | 63,488 | 1975 | 62,106 | 1974 | 61,245 | 1973 | 60,393 | 1972 | 59,410 | 1971 | 58,225 | 1970 | 56,566 | 1969 | 54,624 | 1968 | 52,879 | 1967 | 51,353 | 1966 | 49,817 | 1965 | 48,232 | 1964 | 46,755 | 1963 | 45,493 | 1962 | 44,322 | 1961 | 43,166 | 1960 | 41,719 |
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