| Year | Value | | 2022 | 95,517 | | 2021 | 95,269 | | 2020 | 95,445 | | 2019 | 92,789 | | 2018 | 92,455 | | 2017 | 96,590 | | 2016 | 100,097 | | 2015 | 102,704 | | 2014 | 104,977 | | 2013 | 107,532 | | 2012 | 110,355 | | 2011 | 114,079 | | 2010 | 118,331 | | 2009 | 122,658 | | 2008 | 127,315 | | 2007 | 131,300 | | 2006 | 134,228 | | 2005 | 135,557 | | 2004 | 134,931 | | 2003 | 132,991 | | 2002 | 130,804 | | 2001 | 129,202 | | 2000 | 129,539 | | 1999 | 131,887 | | 1998 | 134,104 | | 1997 | 135,295 | | 1996 | 135,399 | | 1995 | 134,579 | | 1994 | 134,194 | | 1993 | 133,943 | | 1992 | 133,089 | | 1991 | 131,658 | | 1990 | 130,052 | | 1989 | 129,649 | | 1988 | 128,542 | | 1987 | 126,160 | | 1986 | 124,123 | | 1985 | 121,727 | | 1984 | 119,231 | | 1983 | 117,227 | | 1982 | 115,142 | | 1981 | 112,546 | | 1980 | 110,798 | | 1979 | 111,507 | | 1978 | 112,420 | | 1977 | 111,934 | | 1976 | 110,927 | | 1975 | 108,525 | | 1974 | 104,312 | | 1973 | 99,551 | | 1972 | 94,811 | | 1971 | 90,172 | | 1970 | 86,633 | | 1969 | 85,131 | | 1968 | 84,478 | | 1967 | 82,913 | | 1966 | 80,536 | | 1965 | 77,607 | | 1964 | 74,387 | | 1963 | 71,018 | | 1962 | 67,681 | | 1961 | 64,582 | | 1960 | 62,550 |
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