| Year | Value | | 2022 | 62,859 | | 2021 | 61,980 | | 2020 | 62,527 | | 2019 | 64,383 | | 2018 | 67,087 | | 2017 | 70,744 | | 2016 | 75,196 | | 2015 | 79,549 | | 2014 | 83,364 | | 2013 | 87,742 | | 2012 | 94,015 | | 2011 | 101,223 | | 2010 | 108,916 | | 2009 | 115,873 | | 2008 | 120,465 | | 2007 | 123,517 | | 2006 | 125,984 | | 2005 | 128,618 | | 2004 | 131,080 | | 2003 | 132,655 | | 2002 | 132,649 | | 2001 | 131,630 | | 2000 | 130,556 | | 1999 | 129,446 | | 1998 | 128,440 | | 1997 | 127,910 | | 1996 | 128,062 | | 1995 | 128,610 | | 1994 | 129,408 | | 1993 | 130,414 | | 1992 | 131,982 | | 1991 | 133,868 | | 1990 | 135,377 | | 1989 | 136,185 | | 1988 | 136,284 | | 1987 | 135,782 | | 1986 | 134,894 | | 1985 | 133,971 | | 1984 | 133,837 | | 1983 | 134,557 | | 1982 | 135,900 | | 1981 | 138,248 | | 1980 | 141,106 | | 1979 | 143,378 | | 1978 | 144,607 | | 1977 | 144,059 | | 1976 | 140,972 | | 1975 | 136,548 | | 1974 | 131,796 | | 1973 | 126,436 | | 1972 | 121,553 | | 1971 | 118,122 | | 1970 | 115,915 | | 1969 | 115,313 | | 1968 | 115,394 | | 1967 | 114,580 | | 1966 | 112,777 | | 1965 | 111,118 | | 1964 | 109,465 | | 1963 | 108,662 | | 1962 | 110,229 | | 1961 | 112,968 | | 1960 | 115,178 |
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