Year | Value | 2022 | 67,728 | 2021 | 67,786 | 2020 | 67,897 | 2019 | 68,005 | 2018 | 68,079 | 2017 | 68,079 | 2016 | 67,915 | 2015 | 67,593 | 2014 | 67,158 | 2013 | 66,664 | 2012 | 66,073 | 2011 | 65,113 | 2010 | 63,715 | 2009 | 62,143 | 2008 | 60,566 | 2007 | 58,821 | 2006 | 56,702 | 2005 | 54,328 | 2004 | 51,891 | 2003 | 49,593 | 2002 | 47,864 | 2001 | 48,589 | 2000 | 50,054 | 1999 | 50,750 | 1998 | 50,044 | 1997 | 48,613 | 1996 | 47,781 | 1995 | 47,040 | 1994 | 47,212 | 1993 | 48,585 | 1992 | 50,080 | 1991 | 50,516 | 1990 | 50,015 | 1989 | 49,304 | 1988 | 48,347 | 1987 | 47,142 | 1986 | 45,716 | 1985 | 44,125 | 1984 | 42,428 | 1983 | 40,703 | 1982 | 39,017 | 1981 | 37,337 | 1980 | 35,629 | 1979 | 33,853 | 1978 | 31,955 | 1977 | 29,948 | 1976 | 27,977 | 1975 | 26,286 | 1974 | 25,147 | 1973 | 24,828 | 1972 | 25,477 | 1971 | 26,956 | 1970 | 28,843 | 1969 | 30,611 | 1968 | 31,747 | 1967 | 31,893 | 1966 | 31,048 | 1965 | 29,507 | 1964 | 27,619 | 1963 | 25,743 | 1962 | 24,273 | 1961 | 23,311 | 1960 | 22,660 |
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