| Year | Value | | 2022 | 76,209 | | 2021 | 77,081 | | 2020 | 77,804 | | 2019 | 78,740 | | 2018 | 79,473 | | 2017 | 79,843 | | 2016 | 80,032 | | 2015 | 79,953 | | 2014 | 79,412 | | 2013 | 78,429 | | 2012 | 77,218 | | 2011 | 76,056 | | 2010 | 75,119 | | 2009 | 74,318 | | 2008 | 73,621 | | 2007 | 73,021 | | 2006 | 72,348 | | 2005 | 71,600 | | 2004 | 71,082 | | 2003 | 70,993 | | 2002 | 71,171 | | 2001 | 71,273 | | 2000 | 70,107 | | 1999 | 69,686 | | 1998 | 70,538 | | 1997 | 72,507 | | 1996 | 75,386 | | 1995 | 78,323 | | 1994 | 81,199 | | 1993 | 84,261 | | 1992 | 87,012 | | 1991 | 88,071 | | 1990 | 87,582 | | 1989 | 86,820 | | 1988 | 86,027 | | 1987 | 85,093 | | 1986 | 83,877 | | 1985 | 82,448 | | 1984 | 80,823 | | 1983 | 79,042 | | 1982 | 77,059 | | 1981 | 74,580 | | 1980 | 71,578 | | 1979 | 68,183 | | 1978 | 64,604 | | 1977 | 61,189 | | 1976 | 58,422 | | 1975 | 56,374 | | 1974 | 54,931 | | 1973 | 54,012 | | 1972 | 53,616 | | 1971 | 53,805 | | 1970 | 54,198 | | 1969 | 54,478 | | 1968 | 54,804 | | 1967 | 55,127 | | 1966 | 55,410 | | 1965 | 55,657 | | 1964 | 55,843 | | 1963 | 55,927 | | 1962 | 56,574 | | 1961 | 56,708 | | 1960 | 55,752 |
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