| Year | Value | | 2023 | 568,750 | | 2022 | 570,770 | | 2021 | 569,910 | | 2020 | 571,174 | | 2019 | 576,878 | | 2018 | 578,892 | | 2017 | 578,676 | | 2016 | 580,500 | | 2015 | 579,850 | | 2014 | 579,130 | | 2013 | 578,420 | | 2012 | 577,710 | | 2011 | 576,997 | | 2010 | 582,800 | | 2009 | 588,560 | | 2008 | 594,320 | | 2007 | 600,080 | | 2006 | 605,840 | | 2005 | 616,560 | | 2004 | 618,010 | | 2003 | 619,460 | | 2002 | 620,910 | | 2001 | 613,081.608 | | 2000 | 612,870 | | 1999 | 612,630 | | 1998 | 612,390 | | 1997 | 612,150 | | 1996 | 611,920 | | 1995 | 612,610 | | 1994 | 613,290 | | 1993 | 613,970 | | 1992 | 614,650 | | 1991 | 615,332.464 | | 1990 | 614,030 | | 1989 | 612,770 | | 1988 | 611,510 | | 1987 | 610,250 | | 1986 | 608,988.92 | | 1985 | 609,780 | | 1984 | 610,560 | | 1983 | 611,340 | | 1982 | 612,120 | | 1981 | 612,900 | | 1980 | 616,600 | | 1979 | 620,350 | | 1978 | 624,100 | | 1977 | 627,850 | | 1976 | 631,589.9 |
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