Year | Value | 2022 | 41,630 | 2021 | 43,313 | 2020 | 45,205 | 2019 | 46,990 | 2018 | 48,601 | 2017 | 50,005 | 2016 | 51,107 | 2015 | 51,866 | 2014 | 52,294 | 2013 | 52,404 | 2012 | 52,200 | 2011 | 51,652 | 2010 | 50,488 | 2009 | 48,947 | 2008 | 47,520 | 2007 | 46,189 | 2006 | 44,895 | 2005 | 43,563 | 2004 | 42,161 | 2003 | 40,709 | 2002 | 39,259 | 2001 | 37,804 | 2000 | 36,551 | 1999 | 35,743 | 1998 | 35,304 | 1997 | 35,046 | 1996 | 34,794 | 1995 | 34,441 | 1994 | 33,962 | 1993 | 33,419 | 1992 | 32,898 | 1991 | 32,562 | 1990 | 32,517 | 1989 | 32,681 | 1988 | 32,891 | 1987 | 32,944 | 1986 | 32,686 | 1985 | 32,097 | 1984 | 31,257 | 1983 | 30,305 | 1982 | 29,490 | 1981 | 28,955 | 1980 | 28,509 | 1979 | 27,951 | 1978 | 27,279 | 1977 | 26,603 | 1976 | 26,036 | 1975 | 25,832 | 1974 | 26,017 | 1973 | 25,929 | 1972 | 25,259 | 1971 | 24,286 | 1970 | 23,295 | 1969 | 22,561 | 1968 | 22,230 | 1967 | 22,289 | 1966 | 22,565 | 1965 | 22,774 | 1964 | 22,722 | 1963 | 22,387 | 1962 | 21,861 | 1961 | 21,339 | 1960 | 21,077 |
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