| Year | Value | | 2022 | 104,434 | | 2021 | 105,681 | | 2020 | 106,679 | | 2019 | 104,026 | | 2018 | 103,525 | | 2017 | 107,210 | | 2016 | 109,538 | | 2015 | 110,936 | | 2014 | 112,187 | | 2013 | 114,111 | | 2012 | 116,624 | | 2011 | 120,354 | | 2010 | 124,903 | | 2009 | 129,019 | | 2008 | 132,894 | | 2007 | 136,335 | | 2006 | 139,405 | | 2005 | 141,384 | | 2004 | 141,555 | | 2003 | 140,501 | | 2002 | 139,328 | | 2001 | 138,221 | | 2000 | 137,859 | | 1999 | 139,438 | | 1998 | 141,292 | | 1997 | 141,899 | | 1996 | 141,130 | | 1995 | 140,441 | | 1994 | 141,252 | | 1993 | 142,386 | | 1992 | 142,915 | | 1991 | 142,688 | | 1990 | 142,052 | | 1989 | 141,969 | | 1988 | 141,502 | | 1987 | 140,539 | | 1986 | 140,183 | | 1985 | 139,088 | | 1984 | 136,770 | | 1983 | 134,233 | | 1982 | 131,260 | | 1981 | 127,615 | | 1980 | 124,810 | | 1979 | 124,915 | | 1978 | 126,044 | | 1977 | 126,445 | | 1976 | 126,173 | | 1975 | 123,972 | | 1974 | 119,776 | | 1973 | 114,583 | | 1972 | 109,196 | | 1971 | 103,885 | | 1970 | 99,503 | | 1969 | 96,810 | | 1968 | 95,226 | | 1967 | 93,537 | | 1966 | 91,508 | | 1965 | 89,042 | | 1964 | 86,238 | | 1963 | 83,154 | | 1962 | 79,964 | | 1961 | 77,021 | | 1960 | 75,059 |
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