Year | Value | 2022 | 36,732 | 2021 | 36,729 | 2020 | 36,983 | 2019 | 37,438 | 2018 | 38,080 | 2017 | 38,758 | 2016 | 39,375 | 2015 | 39,902 | 2014 | 40,348 | 2013 | 40,694 | 2012 | 40,934 | 2011 | 41,035 | 2010 | 41,135 | 2009 | 41,411 | 2008 | 41,740 | 2007 | 42,093 | 2006 | 42,462 | 2005 | 42,626 | 2004 | 42,462 | 2003 | 42,014 | 2002 | 41,288 | 2001 | 40,295 | 2000 | 39,040 | 1999 | 37,508 | 1998 | 35,892 | 1997 | 34,507 | 1996 | 33,552 | 1995 | 33,223 | 1994 | 33,543 | 1993 | 34,195 | 1992 | 34,889 | 1991 | 35,633 | 1990 | 36,278 | 1989 | 36,735 | 1988 | 37,183 | 1987 | 37,573 | 1986 | 37,760 | 1985 | 37,615 | 1984 | 37,174 | 1983 | 36,545 | 1982 | 35,751 | 1981 | 34,906 | 1980 | 33,975 | 1979 | 32,840 | 1978 | 31,538 | 1977 | 30,189 | 1976 | 28,797 | 1975 | 27,370 | 1974 | 26,242 | 1973 | 25,467 | 1972 | 24,810 | 1971 | 24,294 | 1970 | 23,893 | 1969 | 23,262 | 1968 | 22,426 | 1967 | 21,677 | 1966 | 21,002 | 1965 | 20,393 | 1964 | 19,881 | 1963 | 19,398 | 1962 | 18,852 | 1961 | 18,244 | 1960 | 17,625 |
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