| Year | Value | | 2021 | 9,295,962.176 | | 2020 | 8,219,693.701 | | 2019 | 14,540,298.915128 | | 2018 | 14,197,179.077139 | | 2017 | 13,378,206.138 | | 2016 | 12,649,088 | | 2015 | 11,937,275 | | 2014 | 11,317,875.652588 | | 2013 | 10,496,591.69307 | | 2012 | 9,794,674.5623574 | | 2011 | 9,265,694.6655508 | | 2010 | 8,606,063.3867932 | | 2009 | 7,007,442 | | 2008 | 6,627,091 | | 2007 | 6,474,185 | | 2006 | 5,877,784 | | 2005 | 5,390,223 | | 2004 | 5,073,328 | | 2003 | 4,486,328 | | 2002 | 4,556,340 | | 2001 | 4,645,137 | | 2000 | 4,148,562 | | 1999 | 4,162,400 | | 1998 | 4,004,600 | | 1997 | 4,027,400 | | 1996 | 3,949,100 | | 1995 | 3,833,800 | | 1994 | 3,730,300 | | 1993 | 3,656,700 | | 1992 | 2,610,800 | | 1991 | 2,430,100 | | 1990 | 2,425,700 | | 1989 | 2,371,000 | | 1988 | 2,351,400 | | 1987 | 2,304,800 | | 1986 | 2,222,000 | | 1985 | 2,159,900 | | 1984 | 2,154,600 | | 1983 | 2,036,700 | | 1982 | 1,883,400 | | 1981 | 1,750,100 | | 1980 | 1,722,600 | | 1979 | 1,668,300 | | 1978 | 1,530,500 | | 1977 | 1,506,400 | | 1976 | 1,490,100 | | 1975 | 1,408,500 | | 1974 | 1,335,600 |
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