Year | Value | 2022 | 56,661 | 2021 | 56,653 | 2020 | 56,367 | 2019 | 56,225 | 2018 | 56,023 | 2017 | 56,172 | 2016 | 56,186 | 2015 | 56,114 | 2014 | 56,295 | 2013 | 56,483 | 2012 | 56,810 | 2011 | 56,890 | 2010 | 56,905 | 2009 | 56,323 | 2008 | 56,328 | 2007 | 56,555 | 2006 | 56,774 | 2005 | 56,935 | 2004 | 56,911 | 2003 | 56,765 | 2002 | 56,609 | 2001 | 56,350 | 2000 | 56,200 | 1999 | 56,100 | 1998 | 56,100 | 1997 | 56,000 | 1996 | 55,900 | 1995 | 55,800 | 1994 | 55,500 | 1993 | 55,200 | 1992 | 55,300 | 1991 | 55,500 | 1990 | 55,600 | 1989 | 55,300 | 1988 | 54,800 | 1987 | 54,100 | 1986 | 53,500 | 1985 | 53,200 | 1984 | 52,700 | 1983 | 52,100 | 1982 | 51,500 | 1981 | 51,000 | 1980 | 50,200 | 1979 | 49,600 | 1978 | 49,200 | 1977 | 49,400 | 1976 | 49,700 | 1975 | 49,600 | 1974 | 49,500 | 1973 | 49,000 | 1972 | 48,300 | 1971 | 47,200 | 1970 | 46,400 | 1969 | 44,900 | 1968 | 43,400 | 1967 | 41,900 | 1966 | 40,500 | 1965 | 39,200 | 1964 | 37,600 | 1963 | 36,400 | 1962 | 35,000 | 1961 | 33,700 | 1960 | 32,500 |
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