| Year | Value | | 2021 | 968,476.425 | | 2020 | 715,300.42 | | 2019 | 1,367,458 | | 2018 | 1,442,576 | | 2017 | 1,186,424 | | 2016 | 1,283,181 | | 2015 | 1,430,460 | | 2014 | 2,391,856 | | 2013 | 2,744,844 | | 2012 | 1,398,125.1342956 | | 2011 | 2,284,066.501168 | | 2010 | 2,928,705.6798502 | | 2009 | 1,147,234 | | 2008 | 1,213,854 | | 2007 | 1,204,107 | | 2006 | 1,151,785 | | 2004 | 850,185 | | 2003 | 626,532 | | 2002 | 559,404 | | 2001 | 582,712 | | 2000 | 600,734 | | 1999 | 585,500 | | 1998 | 570,600 | | 1997 | 570,600 | | 1996 | 638,600 | | 1995 | 623,200 | | 1994 | 640,800 | | 1993 | 853,000 | | 1992 | 1,350,100 | | 1991 | 1,883,700 | | 1990 | 1,803,000 | | 1989 | 1,617,000 | | 1988 | 1,581,200 | | 1987 | 1,515,100 | | 1986 | 1,382,900 | | 1985 | 1,579,300 | | 1984 | 1,583,800 | | 1983 | 1,860,000 | | 1982 | 1,557,800 | | 1981 | 1,486,000 | | 1980 | 1,168,800 | | 1979 | 913,800 | | 1978 | 890,600 | | 1977 | 801,900 | | 1976 | 669,900 | | 1975 | 558,000 | | 1974 | 408,000 | | 1973 | 352,000 | | 1972 | 327,200 | | 1971 | 259,400 | | 1970 | 190,200 |
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