| Year | Value | | 2022 | 76,342 | | 2021 | 76,229 | | 2020 | 76,249 | | 2019 | 76,279 | | 2018 | 76,017 | | 2017 | 75,620 | | 2016 | 75,345 | | 2015 | 75,080 | | 2014 | 75,192 | | 2013 | 75,586 | | 2012 | 75,704 | | 2011 | 75,627 | | 2010 | 75,898 | | 2009 | 77,064 | | 2008 | 78,301 | | 2007 | 78,605 | | 2006 | 77,980 | | 2005 | 76,588 | | 2004 | 74,799 | | 2003 | 73,138 | | 2002 | 71,622 | | 2001 | 70,157 | | 2000 | 69,135 | | 1999 | 68,771 | | 1998 | 68,562 | | 1997 | 68,174 | | 1996 | 67,707 | | 1995 | 67,130 | | 1994 | 66,573 | | 1993 | 66,258 | | 1992 | 66,157 | | 1991 | 66,129 | | 1990 | 65,538 | | 1989 | 63,861 | | 1988 | 61,438 | | 1987 | 58,782 | | 1986 | 56,174 | | 1985 | 53,529 | | 1984 | 50,711 | | 1983 | 47,740 | | 1982 | 44,642 | | 1981 | 41,701 | | 1980 | 40,359 | | 1979 | 41,235 | | 1978 | 42,843 | | 1977 | 43,983 | | 1976 | 44,481 | | 1975 | 44,650 | | 1974 | 44,817 | | 1973 | 44,772 | | 1972 | 44,402 | | 1971 | 43,936 | | 1970 | 43,386 | | 1969 | 42,762 | | 1968 | 42,078 | | 1967 | 41,351 | | 1966 | 40,604 | | 1965 | 39,848 | | 1964 | 39,086 | | 1963 | 38,304 | | 1962 | 37,486 | | 1961 | 36,650 | | 1960 | 35,818 |
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