| Year | Value | | 2022 | 151,761 | | 2021 | 147,442 | | 2020 | 146,330 | | 2019 | 145,501 | | 2018 | 144,377 | | 2017 | 144,056 | | 2016 | 144,098 | | 2015 | 144,126 | | 2014 | 146,482 | | 2013 | 152,855 | | 2012 | 161,730 | | 2011 | 172,460 | | 2010 | 184,086 | | 2009 | 195,283 | | 2008 | 202,793 | | 2007 | 202,437 | | 2006 | 193,266 | | 2005 | 179,284 | | 2004 | 167,373 | | 2003 | 160,869 | | 2002 | 157,406 | | 2001 | 153,294 | | 2000 | 148,040 | | 1999 | 142,652 | | 1998 | 137,799 | | 1997 | 133,405 | | 1996 | 129,332 | | 1995 | 125,980 | | 1994 | 123,050 | | 1993 | 120,856 | | 1992 | 119,836 | | 1991 | 119,409 | | 1990 | 119,197 | | 1989 | 119,643 | | 1988 | 121,889 | | 1987 | 125,281 | | 1986 | 127,521 | | 1985 | 128,192 | | 1984 | 127,964 | | 1983 | 127,234 | | 1982 | 126,334 | | 1981 | 124,940 | | 1980 | 123,504 | | 1979 | 120,620 | | 1978 | 118,092 | | 1977 | 117,121 | | 1976 | 115,572 | | 1975 | 113,322 | | 1974 | 110,858 | | 1973 | 106,427 | | 1972 | 99,361 | | 1971 | 91,924 | | 1970 | 85,404 | | 1969 | 81,002 | | 1968 | 77,455 | | 1967 | 74,358 | | 1966 | 73,451 | | 1965 | 74,204 | | 1964 | 74,138 | | 1963 | 73,256 | | 1962 | 72,522 | | 1961 | 72,203 | | 1960 | 74,907 |
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