Year | Value | 2022 | 44,198 | 2021 | 43,048 | 2020 | 42,215 | 2019 | 41,909 | 2018 | 42,049 | 2017 | 42,721 | 2016 | 43,886 | 2015 | 45,298 | 2014 | 46,680 | 2013 | 47,883 | 2012 | 48,666 | 2011 | 48,815 | 2010 | 48,426 | 2009 | 47,600 | 2008 | 46,566 | 2007 | 45,562 | 2006 | 44,739 | 2005 | 43,934 | 2004 | 42,934 | 2003 | 41,908 | 2002 | 40,907 | 2001 | 39,970 | 2000 | 39,122 | 1999 | 38,157 | 1998 | 36,657 | 1997 | 34,714 | 1996 | 32,259 | 1995 | 29,734 | 1994 | 27,636 | 1993 | 25,832 | 1992 | 24,257 | 1991 | 22,868 | 1990 | 21,785 | 1989 | 20,874 | 1988 | 20,134 | 1987 | 19,802 | 1986 | 19,742 | 1985 | 19,747 | 1984 | 19,780 | 1983 | 19,768 | 1982 | 19,620 | 1981 | 19,230 | 1980 | 18,774 | 1979 | 18,426 | 1978 | 18,334 | 1977 | 18,671 | 1976 | 19,250 | 1975 | 19,921 | 1974 | 20,427 | 1973 | 20,598 | 1972 | 20,388 | 1971 | 19,835 | 1970 | 19,024 | 1969 | 18,091 | 1968 | 17,176 | 1967 | 16,377 | 1966 | 15,759 | 1965 | 15,365 | 1964 | 15,176 | 1963 | 15,101 | 1962 | 14,984 | 1961 | 14,624 | 1960 | 14,386 |
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