Year | Value | 2022 | 46,130 | 2021 | 45,673 | 2020 | 45,589 | 2019 | 45,436 | 2018 | 45,510 | 2017 | 45,262 | 2016 | 44,410 | 2015 | 42,616 | 2014 | 39,942 | 2013 | 37,275 | 2012 | 35,641 | 2011 | 35,944 | 2010 | 37,687 | 2009 | 40,110 | 2008 | 42,947 | 2007 | 45,358 | 2006 | 45,977 | 2005 | 45,583 | 2004 | 44,792 | 2003 | 43,437 | 2002 | 42,439 | 2001 | 42,210 | 2000 | 42,742 | 1999 | 43,291 | 1998 | 44,280 | 1997 | 45,125 | 1996 | 45,309 | 1995 | 45,494 | 1994 | 45,650 | 1993 | 45,661 | 1992 | 45,372 | 1991 | 44,622 | 1990 | 42,784 | 1989 | 40,027 | 1988 | 37,175 | 1987 | 34,100 | 1986 | 31,082 | 1985 | 29,878 | 1984 | 30,830 | 1983 | 32,443 | 1982 | 34,888 | 1981 | 37,967 | 1980 | 40,226 | 1979 | 41,192 | 1978 | 41,379 | 1977 | 41,344 | 1976 | 41,122 | 1975 | 40,703 | 1974 | 40,173 | 1973 | 39,891 | 1972 | 39,605 | 1971 | 39,053 | 1970 | 38,708 | 1969 | 38,420 | 1968 | 37,739 | 1967 | 36,850 | 1966 | 36,083 | 1965 | 35,100 | 1964 | 33,843 | 1963 | 32,880 | 1962 | 32,377 | 1961 | 31,984 | 1960 | 31,403 |
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