Year | Value | 2021 | 510,363.028 | 2020 | 511,648.336 | 2019 | 521,123.39 | 2018 | 516,300 | 2017 | 515,348.6 | 2016 | 516,233.8 | 2015 | 519,245.9 | 2014 | 518,221.4 | 2013 | 518,923.1 | 2012 | 517,581.8 | 2011 | 521,343.5 | 2010 | 519,523.8 | 2009 | 529,073.9 | 2008 | 529,461.7 | 2007 | 526,982 | 2006 | 537,651.5 | 2005 | 539,333.9 | 2004 | 539,010.9 | 2003 | 547,221.2 | 2002 | 556,442.6 | 2001 | 575,370 | 2000 | 591,050 | 1999 | 604,520 | 1998 | 605,100 | 1997 | 610,260 | 1996 | 610,780 | 1995 | 615,910 | 1994 | 621,440 | 1993 | 624,860 | 1992 | 628,120 | 1991 | 631,610 | 1990 | 631,840 | 1989 | 632,060 | 1988 | 635,770 | 1987 | 636,280 | 1986 | 635,950 | 1985 | 636,310 | 1984 | 636,460 | 1983 | 635,970 | 1982 | 636,070 | 1981 | 636,270 | 1980 | 637,680 | 1979 | 638,610 | 1978 | 639,740 | 1977 | 640,430 | 1976 | 640,980 | 1975 | 638,840 | 1974 | 639,950 | 1973 | 640,360 | 1972 | 641,710 | 1971 | 642,960 | 1970 | 643,470 | 1969 | 644,240 | 1968 | 645,220 | 1967 | 644,230 | 1966 | 645,000 | 1965 | 644,720 | 1964 | 646,120 | 1963 | 645,740 | 1962 | 646,360 | 1961 | 646,680 |
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