| Year | Value | | 2022 | 336,702 | | 2021 | 310,123 | | 2020 | 302,758 | | 2019 | 302,257 | | 2018 | 308,187 | | 2017 | 317,762 | | 2016 | 319,010 | | 2015 | 310,663 | | 2014 | 297,451 | | 2013 | 279,584 | | 2012 | 258,958 | | 2011 | 241,697 | | 2010 | 232,164 | | 2009 | 225,388 | | 2008 | 217,138 | | 2007 | 213,583 | | 2006 | 216,716 | | 2005 | 214,837 | | 2004 | 207,613 | | 2003 | 200,530 | | 2002 | 193,233 | | 2001 | 186,247 | | 2000 | 180,046 | | 1999 | 174,125 | | 1998 | 168,987 | | 1997 | 164,567 | | 1996 | 160,232 | | 1995 | 155,561 | | 1994 | 150,686 | | 1993 | 143,780 | | 1992 | 137,048 | | 1991 | 133,478 | | 1990 | 133,513 | | 1989 | 134,051 | | 1988 | 133,136 | | 1987 | 132,929 | | 1986 | 132,382 | | 1985 | 132,746 | | 1984 | 133,686 | | 1983 | 134,237 | | 1982 | 135,288 | | 1981 | 136,277 | | 1980 | 136,379 | | 1979 | 135,578 | | 1978 | 134,002 | | 1977 | 131,784 | | 1976 | 129,656 | | 1975 | 127,994 | | 1974 | 126,556 | | 1973 | 125,140 | | 1972 | 123,737 | | 1971 | 122,140 | | 1970 | 120,140 | | 1969 | 117,806 | | 1968 | 115,151 | | 1967 | 112,109 | | 1966 | 108,792 | | 1965 | 105,300 | | 1964 | 101,639 | | 1963 | 97,757 | | 1962 | 93,736 | | 1961 | 89,816 | | 1960 | 86,148 |
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