| Year | Value | | 2022 | 131,450 | | 2021 | 135,636 | | 2020 | 139,832 | | 2019 | 141,848 | | 2018 | 142,400 | | 2017 | 141,160 | | 2016 | 138,643 | | 2015 | 135,409 | | 2014 | 131,916 | | 2013 | 128,503 | | 2012 | 125,590 | | 2011 | 123,396 | | 2010 | 121,336 | | 2009 | 119,699 | | 2008 | 118,244 | | 2007 | 114,640 | | 2006 | 108,681 | | 2005 | 99,198 | | 2004 | 86,813 | | 2003 | 74,555 | | 2002 | 67,679 | | 2001 | 70,581 | | 2000 | 83,356 | | 1999 | 102,660 | | 1998 | 124,406 | | 1997 | 143,655 | | 1996 | 156,206 | | 1995 | 161,331 | | 1994 | 161,396 | | 1993 | 156,088 | | 1992 | 148,264 | | 1991 | 142,994 | | 1990 | 141,662 | | 1989 | 144,796 | | 1988 | 149,427 | | 1987 | 153,195 | | 1986 | 155,798 | | 1985 | 156,094 | | 1984 | 153,235 | | 1983 | 147,185 | | 1982 | 138,988 | | 1981 | 130,040 | | 1980 | 121,469 | | 1979 | 113,460 | | 1978 | 106,550 | | 1977 | 101,299 | | 1976 | 97,651 | | 1975 | 96,343 | | 1974 | 97,638 | | 1973 | 101,181 | | 1972 | 105,932 | | 1971 | 110,059 | | 1970 | 113,101 | | 1969 | 114,428 | | 1968 | 113,489 | | 1967 | 110,649 | | 1966 | 106,271 | | 1965 | 101,836 | | 1964 | 98,390 | | 1963 | 96,042 | | 1962 | 94,575 | | 1961 | 93,203 | | 1960 | 91,056 |
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