Year | Value | 2022 | 40,345 | 2021 | 39,609 | 2020 | 39,032 | 2019 | 38,698 | 2018 | 38,541 | 2017 | 38,550 | 2016 | 38,818 | 2015 | 39,289 | 2014 | 39,840 | 2013 | 40,459 | 2012 | 41,116 | 2011 | 41,718 | 2010 | 42,237 | 2009 | 42,672 | 2008 | 42,990 | 2007 | 43,267 | 2006 | 43,466 | 2005 | 43,650 | 2004 | 44,006 | 2003 | 44,407 | 2002 | 44,738 | 2001 | 45,023 | 2000 | 45,139 | 1999 | 44,927 | 1998 | 44,426 | 1997 | 43,677 | 1996 | 42,731 | 1995 | 41,707 | 1994 | 40,584 | 1993 | 39,413 | 1992 | 38,465 | 1991 | 37,938 | 1990 | 37,726 | 1989 | 37,807 | 1988 | 38,174 | 1987 | 38,531 | 1986 | 38,808 | 1985 | 38,998 | 1984 | 39,102 | 1983 | 39,204 | 1982 | 39,306 | 1981 | 39,162 | 1980 | 38,770 | 1979 | 38,292 | 1978 | 37,659 | 1977 | 36,877 | 1976 | 36,098 | 1975 | 35,290 | 1974 | 34,307 | 1973 | 33,150 | 1972 | 31,885 | 1971 | 30,527 | 1970 | 29,083 | 1969 | 27,880 | 1968 | 27,023 | 1967 | 26,275 | 1966 | 25,602 | 1965 | 24,990 | 1964 | 24,153 | 1963 | 23,119 | 1962 | 22,204 | 1961 | 21,430 | 1960 | 20,791 |
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