| Year | Value | | 2022 | 648,963 | | 2021 | 611,360 | | 2020 | 571,194 | | 2019 | 536,431 | | 2018 | 507,824 | | 2017 | 488,621 | | 2016 | 480,602 | | 2015 | 478,082 | | 2014 | 472,409 | | 2013 | 460,306 | | 2012 | 446,691 | | 2011 | 438,538 | | 2010 | 430,764 | | 2009 | 418,846 | | 2008 | 407,264 | | 2007 | 393,722 | | 2006 | 379,386 | | 2005 | 365,541 | | 2004 | 350,594 | | 2003 | 335,690 | | 2002 | 322,362 | | 2001 | 310,394 | | 2000 | 298,721 | | 1999 | 287,982 | | 1998 | 277,666 | | 1997 | 267,282 | | 1996 | 258,950 | | 1995 | 250,859 | | 1994 | 243,443 | | 1993 | 233,132 | | 1992 | 226,458 | | 1991 | 235,818 | | 1990 | 246,319 | | 1989 | 251,150 | | 1988 | 259,626 | | 1987 | 262,627 | | 1986 | 255,399 | | 1985 | 246,988 | | 1984 | 239,063 | | 1983 | 232,366 | | 1982 | 226,953 | | 1981 | 228,235 | | 1980 | 228,130 | | 1979 | 209,104 | | 1978 | 182,333 | | 1977 | 166,380 | | 1976 | 157,759 | | 1975 | 148,628 | | 1974 | 140,580 | | 1973 | 134,622 | | 1972 | 129,434 | | 1971 | 124,827 | | 1970 | 121,138 | | 1969 | 118,344 | | 1968 | 116,515 | | 1967 | 115,280 | | 1966 | 114,024 | | 1965 | 112,371 | | 1964 | 110,286 | | 1963 | 107,661 | | 1962 | 104,628 | | 1961 | 101,814 | | 1960 | 99,566 |
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