Year | Value | 2022 | 52,938 | 2021 | 50,652 | 2020 | 48,337 | 2019 | 46,045 | 2018 | 43,915 | 2017 | 41,812 | 2016 | 39,617 | 2015 | 37,448 | 2014 | 35,317 | 2013 | 33,191 | 2012 | 31,070 | 2011 | 29,029 | 2010 | 27,175 | 2009 | 25,576 | 2008 | 24,255 | 2007 | 23,209 | 2006 | 22,404 | 2005 | 21,788 | 2004 | 21,305 | 2003 | 20,934 | 2002 | 20,664 | 2001 | 20,467 | 2000 | 20,318 | 1999 | 20,223 | 1998 | 20,170 | 1997 | 20,080 | 1996 | 19,904 | 1995 | 19,629 | 1994 | 19,197 | 1993 | 18,592 | 1992 | 17,904 | 1991 | 17,258 | 1990 | 16,807 | 1989 | 16,523 | 1988 | 16,269 | 1987 | 16,052 | 1986 | 15,883 | 1985 | 15,751 | 1984 | 15,647 | 1983 | 15,571 | 1982 | 15,516 | 1981 | 15,468 | 1980 | 15,425 | 1979 | 15,341 | 1978 | 14,787 | 1977 | 14,039 | 1976 | 13,727 | 1975 | 13,779 | 1974 | 14,122 | 1973 | 14,657 | 1972 | 15,214 | 1971 | 15,872 | 1970 | 16,425 | 1969 | 16,894 | 1968 | 17,299 | 1967 | 17,474 | 1966 | 17,796 | 1965 | 18,344 | 1964 | 18,976 | 1963 | 19,290 | 1962 | 19,153 | 1961 | 18,879 | 1960 | 18,584 |
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