| Year | Value | | 2022 | 1,531,546 | | 2021 | 1,532,362 | | 2020 | 1,529,761 | | 2019 | 1,522,164 | | 2018 | 1,507,398 | | 2017 | 1,485,903 | | 2016 | 1,459,967 | | 2015 | 1,429,751 | | 2014 | 1,393,877 | | 2013 | 1,353,338 | | 2012 | 1,309,414 | | 2011 | 1,262,856 | | 2010 | 1,214,799 | | 2009 | 1,166,273 | | 2008 | 1,118,039 | | 2007 | 1,070,403 | | 2006 | 1,023,541 | | 2005 | 978,198 | | 2004 | 934,541 | | 2003 | 890,118 | | 2002 | 846,093 | | 2001 | 805,129 | | 2000 | 766,022 | | 1999 | 728,584 | | 1998 | 695,358 | | 1997 | 665,214 | | 1996 | 635,668 | | 1995 | 607,610 | | 1994 | 581,058 | | 1993 | 556,028 | | 1992 | 532,955 | | 1991 | 512,412 | | 1990 | 494,368 | | 1989 | 478,669 | | 1988 | 465,656 | | 1987 | 454,766 | | 1986 | 444,599 | | 1985 | 434,442 | | 1984 | 424,155 | | 1983 | 413,485 | | 1982 | 402,559 | | 1981 | 391,786 | | 1980 | 381,194 | | 1979 | 370,581 | | 1978 | 359,784 | | 1977 | 348,908 | | 1976 | 338,407 | | 1975 | 328,355 | | 1974 | 318,462 | | 1973 | 308,629 | | 1972 | 299,271 | | 1971 | 291,150 | | 1970 | 284,450 | | 1969 | 279,090 | | 1968 | 275,390 | | 1967 | 272,642 | | 1966 | 269,107 | | 1965 | 263,816 | | 1964 | 257,018 | | 1963 | 248,694 | | 1962 | 239,125 | | 1961 | 229,780 | | 1960 | 221,527 |
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