Year | Value | 2022 | 25,071 | 2021 | 25,999 | 2020 | 27,023 | 2019 | 28,161 | 2018 | 29,470 | 2017 | 30,690 | 2016 | 31,648 | 2015 | 32,411 | 2014 | 32,962 | 2013 | 33,236 | 2012 | 33,429 | 2011 | 33,720 | 2010 | 34,141 | 2009 | 34,538 | 2008 | 34,790 | 2007 | 34,871 | 2006 | 34,816 | 2005 | 34,872 | 2004 | 35,258 | 2003 | 35,795 | 2002 | 36,345 | 2001 | 36,945 | 2000 | 37,528 | 1999 | 38,100 | 1998 | 38,642 | 1997 | 39,152 | 1996 | 39,574 | 1995 | 39,797 | 1994 | 40,173 | 1993 | 40,889 | 1992 | 43,583 | 1991 | 45,940 | 1990 | 45,673 | 1989 | 44,924 | 1988 | 44,061 | 1987 | 43,153 | 1986 | 42,208 | 1985 | 41,244 | 1984 | 40,263 | 1983 | 39,252 | 1982 | 38,215 | 1981 | 37,152 | 1980 | 36,063 | 1979 | 34,959 | 1978 | 33,858 | 1977 | 32,777 | 1976 | 31,720 | 1975 | 30,691 | 1974 | 29,698 | 1973 | 28,725 | 1972 | 27,766 | 1971 | 26,829 | 1970 | 25,914 | 1969 | 25,014 | 1968 | 24,135 | 1967 | 23,278 | 1966 | 22,444 | 1965 | 21,639 | 1964 | 20,873 | 1963 | 20,149 | 1962 | 19,470 | 1961 | 18,836 | 1960 | 18,240 |
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