| Year | Value | | 2019 | 80,349 | | 2018 | 79,327 | | 2017 | 78,366 | | 2016 | 77,648 | | 2015 | 77,324 | | 2014 | 77,460 | | 2013 | 77,973 | | 2012 | 78,661 | | 2011 | 79,284 | | 2010 | 79,665 | | 2009 | 79,647 | | 2008 | 79,311 | | 2007 | 78,755 | | 2006 | 78,126 | | 2005 | 77,540 | | 2004 | 77,041 | | 2003 | 76,586 | | 2002 | 76,179 | | 2001 | 75,795 | | 2000 | 75,427 | | 1999 | 75,077 | | 1998 | 74,758 | | 1997 | 74,467 | | 1996 | 74,229 | | 1995 | 74,032 | | 1994 | 73,880 | | 1993 | 73,770 | | 1992 | 73,679 | | 1991 | 73,591 | | 1990 | 73,485 | | 1989 | 73,346 | | 1988 | 73,175 | | 1987 | 72,996 | | 1986 | 72,922 | | 1985 | 72,987 | | 1984 | 73,115 | | 1983 | 73,280 | | 1982 | 73,420 | | 1981 | 73,445 | | 1980 | 73,304 | | 1979 | 72,952 | | 1978 | 72,411 | | 1977 | 71,763 | | 1976 | 71,060 | | 1975 | 70,357 | | 1974 | 69,797 | | 1973 | 69,329 | | 1972 | 68,845 | | 1971 | 68,214 | | 1970 | 67,323 | | 1969 | 66,154 | | 1968 | 64,760 | | 1967 | 63,147 | | 1966 | 61,487 | | 1965 | 59,848 | | 1964 | 58,040 | | 1963 | 56,081 | | 1962 | 54,106 | | 1961 | 52,292 | | 1960 | 50,769 |
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