| Year | Value | | 2022 | 518,069 | | 2021 | 515,718 | | 2020 | 513,255 | | 2019 | 510,750 | | 2018 | 508,563 | | 2017 | 507,066 | | 2016 | 506,505 | | 2015 | 506,991 | | 2014 | 508,502 | | 2013 | 510,834 | | 2012 | 513,621 | | 2011 | 516,630 | | 2010 | 519,673 | | 2009 | 522,486 | | 2008 | 525,020 | | 2007 | 527,344 | | 2006 | 529,346 | | 2005 | 530,781 | | 2004 | 531,291 | | 2003 | 529,952 | | 2002 | 526,122 | | 2001 | 520,226 | | 2000 | 512,853 | | 1999 | 504,567 | | 1998 | 497,301 | | 1997 | 490,046 | | 1996 | 481,206 | | 1995 | 471,904 | | 1994 | 462,203 | | 1993 | 452,268 | | 1992 | 442,615 | | 1991 | 433,643 | | 1990 | 425,340 | | 1989 | 417,563 | | 1988 | 410,431 | | 1987 | 403,586 | | 1986 | 396,656 | | 1985 | 389,711 | | 1984 | 382,590 | | 1983 | 374,938 | | 1982 | 366,766 | | 1981 | 358,279 | | 1980 | 349,393 | | 1979 | 339,888 | | 1978 | 330,049 | | 1977 | 320,320 | | 1976 | 310,521 | | 1975 | 300,629 | | 1974 | 291,909 | | 1973 | 283,802 | | 1972 | 275,104 | | 1971 | 266,721 | | 1970 | 259,104 | | 1969 | 252,022 | | 1968 | 245,210 | | 1967 | 238,698 | | 1966 | 232,427 | | 1965 | 226,234 | | 1964 | 220,218 | | 1963 | 214,490 | | 1962 | 208,949 | | 1961 | 203,513 | | 1960 | 198,115 |
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