Year | Value | 2021 | 43,281.733479746 | 2020 | 39,515.557406996 | 2019 | 40,712.575341249 | 2018 | 41,651.80739037 | 2017 | 38,441.732718549 | 2016 | 37,196.167747422 | 2015 | 35,811.685775151 | 2014 | 42,465.766605579 | 2013 | 41,694.071408687 | 2012 | 39,980.630839289 | 2011 | 42,625.237354533 | 2010 | 39,022.256155236 | 2009 | 39,649.394823699 | 2008 | 43,635.109927905 | 2007 | 39,159.005776308 | 2006 | 33,992.180434471 | 2005 | 31,858.616035151 | 2004 | 30,611.249197044 | 2003 | 26,718.418439689 | 2002 | 21,920.52197753 | 2001 | 20,142.909992595 | 2000 | 20,391.623865179 | 1999 | 22,355.194500154 | 1998 | 22,789.998689281 | 1997 | 22,282.145263577 | 1996 | 25,025.553419869 | 1995 | 25,386.488727795 | 1994 | 21,546.584564019 | 1993 | 20,251.09894117 | 1992 | 20,999.647418165 | 1991 | 18,906.061520225 | 1990 | 18,400.43006127 | 1989 | 14,792.558032793 | 1988 | 14,880.064367976 | 1987 | 13,792.323979008 | 1986 | 11,018.276760933 | 1985 | 7,740.7890414209 | 1984 | 7,571.9674991993 | 1983 | 8,040.7356662741 | 1982 | 7,896.8561648533 | 1981 | 7,864.491314587 | 1980 | 9,175.1352937007 | 1979 | 8,311.1726146642 | 1978 | 6,956.9233717426 | 1977 | 5,800.3458689963 | 1976 | 4,855.456556021 | 1975 | 4,500.8168516096 | 1974 | 3,957.5241919229 | 1973 | 3,332.0987124018 | 1972 | 2,497.4177910863 | 1971 | 2,033.9707612796 | 1970 | 1,761.3835796701 |
|