Year | Value | 2022 | 52,240 | 2021 | 50,542 | 2020 | 49,729 | 2019 | 48,727 | 2018 | 47,429 | 2017 | 46,512 | 2016 | 46,165 | 2015 | 46,081 | 2014 | 46,049 | 2013 | 46,219 | 2012 | 46,569 | 2011 | 47,002 | 2010 | 47,400 | 2009 | 47,580 | 2008 | 47,446 | 2007 | 46,759 | 2006 | 45,802 | 2005 | 45,078 | 2004 | 44,886 | 2003 | 45,174 | 2002 | 46,172 | 2001 | 47,750 | 2000 | 49,334 | 1999 | 49,477 | 1998 | 49,332 | 1997 | 50,042 | 1996 | 50,658 | 1995 | 51,631 | 1994 | 52,855 | 1993 | 54,245 | 1992 | 55,939 | 1991 | 56,909 | 1990 | 56,588 | 1989 | 56,120 | 1988 | 55,889 | 1987 | 55,319 | 1986 | 54,060 | 1985 | 51,714 | 1984 | 48,304 | 1983 | 44,950 | 1982 | 42,959 | 1981 | 43,244 | 1980 | 45,219 | 1979 | 48,068 | 1978 | 51,476 | 1977 | 54,260 | 1976 | 54,847 | 1975 | 54,277 | 1974 | 53,255 | 1973 | 51,461 | 1972 | 50,129 | 1971 | 49,752 | 1970 | 50,161 | 1969 | 50,994 | 1968 | 51,815 | 1967 | 52,092 | 1966 | 51,069 | 1965 | 48,317 | 1964 | 44,842 | 1963 | 41,393 | 1962 | 37,865 | 1961 | 34,713 | 1960 | 32,495 |
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