Year | Value | 2022 | 34,263 | 2021 | 34,026 | 2020 | 33,770 | 2019 | 33,491 | 2018 | 33,226 | 2017 | 32,974 | 2016 | 32,739 | 2015 | 32,517 | 2014 | 32,307 | 2013 | 32,118 | 2012 | 31,941 | 2011 | 31,761 | 2010 | 31,538 | 2009 | 32,602 | 2008 | 33,936 | 2007 | 35,319 | 2006 | 36,737 | 2005 | 38,179 | 2004 | 39,636 | 2003 | 41,114 | 2002 | 42,600 | 2001 | 44,120 | 2000 | 44,300 | 1999 | 44,266 | 1998 | 44,183 | 1997 | 44,096 | 1996 | 43,981 | 1995 | 43,823 | 1994 | 43,610 | 1993 | 43,341 | 1992 | 43,002 | 1991 | 42,663 | 1990 | 41,764 | 1989 | 40,818 | 1988 | 39,898 | 1987 | 38,966 | 1986 | 38,023 | 1985 | 37,068 | 1984 | 36,109 | 1983 | 35,146 | 1982 | 34,182 | 1981 | 33,222 | 1980 | 32,281 | 1979 | 31,381 | 1978 | 30,521 | 1977 | 29,689 | 1976 | 28,883 | 1975 | 28,097 | 1974 | 27,367 | 1973 | 26,679 | 1972 | 25,996 | 1971 | 25,317 | 1970 | 24,646 | 1969 | 24,034 | 1968 | 23,497 | 1967 | 22,981 | 1966 | 22,476 | 1965 | 21,986 | 1964 | 21,508 | 1963 | 21,040 | 1962 | 20,579 | 1961 | 20,125 | 1960 | 19,660 |
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