| Year | Value | | 2022 | 155,700 | | 2021 | 148,749 | | 2020 | 141,530 | | 2019 | 134,044 | | 2018 | 126,512 | | 2017 | 118,988 | | 2016 | 111,570 | | 2015 | 104,509 | | 2014 | 98,010 | | 2013 | 92,253 | | 2012 | 87,303 | | 2011 | 83,183 | | 2010 | 79,866 | | 2009 | 77,181 | | 2008 | 74,502 | | 2007 | 71,683 | | 2006 | 69,147 | | 2005 | 66,866 | | 2004 | 64,684 | | 2003 | 62,907 | | 2002 | 61,562 | | 2001 | 60,139 | | 2000 | 58,539 | | 1999 | 56,889 | | 1998 | 55,275 | | 1997 | 53,679 | | 1996 | 52,066 | | 1995 | 50,431 | | 1994 | 48,770 | | 1993 | 47,070 | | 1992 | 45,318 | | 1991 | 43,482 | | 1990 | 41,374 | | 1989 | 39,862 | | 1988 | 39,425 | | 1987 | 39,291 | | 1986 | 39,233 | | 1985 | 39,250 | | 1984 | 39,306 | | 1983 | 39,354 | | 1982 | 39,335 | | 1981 | 39,199 | | 1980 | 38,186 | | 1979 | 36,281 | | 1978 | 34,218 | | 1977 | 32,024 | | 1976 | 29,730 | | 1975 | 27,381 | | 1974 | 25,032 | | 1973 | 22,741 | | 1972 | 20,561 | | 1971 | 19,079 | | 1970 | 18,279 | | 1969 | 17,587 | | 1968 | 17,014 | | 1967 | 16,565 | | 1966 | 16,146 | | 1965 | 15,772 | | 1964 | 15,486 | | 1963 | 15,147 | | 1962 | 14,677 | | 1961 | 14,055 | | 1960 | 13,017 |
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