| Year | Value | | 2022 | 72,250 | | 2021 | 76,912 | | 2020 | 78,715 | | 2019 | 81,185 | | 2018 | 85,259 | | 2017 | 90,533 | | 2016 | 96,734 | | 2015 | 103,422 | | 2014 | 110,043 | | 2013 | 114,706 | | 2012 | 117,218 | | 2011 | 117,546 | | 2010 | 115,837 | | 2009 | 113,072 | | 2008 | 110,354 | | 2007 | 108,382 | | 2006 | 107,678 | | 2005 | 108,305 | | 2004 | 108,658 | | 2003 | 107,671 | | 2002 | 104,480 | | 2001 | 97,954 | | 2000 | 88,238 | | 1999 | 76,305 | | 1998 | 65,687 | | 1997 | 60,488 | | 1996 | 61,724 | | 1995 | 66,733 | | 1994 | 73,326 | | 1993 | 79,574 | | 1992 | 84,411 | | 1991 | 87,294 | | 1990 | 88,702 | | 1989 | 89,022 | | 1988 | 87,920 | | 1987 | 85,849 | | 1986 | 83,935 | | 1985 | 83,073 | | 1984 | 83,548 | | 1983 | 85,038 | | 1982 | 86,595 | | 1981 | 87,526 | | 1980 | 87,667 | | 1979 | 87,064 | | 1978 | 86,024 | | 1977 | 84,843 | | 1976 | 83,378 | | 1975 | 81,292 | | 1974 | 78,219 | | 1973 | 73,682 | | 1972 | 68,032 | | 1971 | 62,375 | | 1970 | 57,927 | | 1969 | 55,472 | | 1968 | 55,353 | | 1967 | 57,008 | | 1966 | 59,014 | | 1965 | 60,201 | | 1964 | 60,006 | | 1963 | 58,239 | | 1962 | 55,319 | | 1961 | 52,033 | | 1960 | 49,200 |
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