Year | Value | 2022 | 37,872 | 2021 | 38,258 | 2020 | 38,250 | 2019 | 39,502 | 2018 | 38,627 | 2017 | 36,320 | 2016 | 36,235 | 2015 | 35,864 | 2014 | 35,186 | 2013 | 34,409 | 2012 | 33,315 | 2011 | 32,138 | 2010 | 31,371 | 2009 | 30,900 | 2008 | 30,615 | 2007 | 30,540 | 2006 | 30,677 | 2005 | 31,010 | 2004 | 31,487 | 2003 | 32,053 | 2002 | 32,670 | 2001 | 33,311 | 2000 | 33,935 | 1999 | 34,483 | 1998 | 34,932 | 1997 | 35,318 | 1996 | 35,652 | 1995 | 35,940 | 1994 | 36,223 | 1993 | 36,519 | 1992 | 36,827 | 1991 | 37,251 | 1990 | 37,974 | 1989 | 38,874 | 1988 | 39,710 | 1987 | 40,401 | 1986 | 40,882 | 1985 | 41,107 | 1984 | 41,052 | 1983 | 40,718 | 1982 | 40,085 | 1981 | 39,209 | 1980 | 38,401 | 1979 | 37,652 | 1978 | 36,747 | 1977 | 35,787 | 1976 | 34,801 | 1975 | 33,730 | 1974 | 32,598 | 1973 | 31,439 | 1972 | 30,260 | 1971 | 29,068 | 1970 | 27,983 | 1969 | 26,991 | 1968 | 25,992 | 1967 | 25,041 | 1966 | 24,163 | 1965 | 23,378 | 1964 | 22,703 | 1963 | 22,127 | 1962 | 21,626 | 1961 | 21,160 | 1960 | 20,728 |
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