| Year | Value | | 2022 | 669,023 | | 2021 | 654,453 | | 2020 | 640,986 | | 2019 | 628,940 | | 2018 | 616,661 | | 2017 | 603,346 | | 2016 | 589,149 | | 2015 | 574,663 | | 2014 | 559,912 | | 2013 | 543,723 | | 2012 | 529,267 | | 2011 | 513,455 | | 2010 | 493,283 | | 2009 | 472,612 | | 2008 | 451,791 | | 2007 | 430,790 | | 2006 | 409,844 | | 2005 | 389,335 | | 2004 | 369,357 | | 2003 | 350,327 | | 2002 | 332,454 | | 2001 | 315,742 | | 2000 | 300,517 | | 1999 | 286,826 | | 1998 | 274,713 | | 1997 | 265,066 | | 1996 | 258,069 | | 1995 | 252,690 | | 1994 | 248,239 | | 1993 | 244,491 | | 1992 | 241,386 | | 1991 | 239,021 | | 1990 | 237,012 | | 1989 | 235,399 | | 1988 | 234,991 | | 1987 | 235,498 | | 1986 | 235,899 | | 1985 | 235,404 | | 1984 | 233,269 | | 1983 | 229,999 | | 1982 | 226,771 | | 1981 | 223,114 | | 1980 | 218,587 | | 1979 | 214,973 | | 1978 | 212,694 | | 1977 | 210,519 | | 1976 | 209,108 | | 1975 | 208,163 | | 1974 | 205,439 | | 1973 | 200,499 | | 1972 | 194,696 | | 1971 | 189,182 | | 1970 | 184,442 | | 1969 | 181,199 | | 1968 | 179,640 | | 1967 | 178,964 | | 1966 | 178,727 | | 1965 | 178,615 | | 1964 | 178,630 | | 1963 | 178,813 | | 1962 | 179,071 | | 1961 | 179,415 | | 1960 | 179,872 |
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