Year current US$ 1972 190000.0069290396 1973 9999.99977648258 1974 230000.004172325 1975 399999.9947845934 1976 500000.007450581 1977 440000.005066395 1978 199999.99739229685 1979 229999.9948590994 1980 739999.9890476466 1981 17339999.70182775 1982 5330000.001937152 1983 1129999.9654293023 1984 880000.0008195571 1985 1140000.0043213367 1986 1480000.0414252246 1987 1939999.9231100075 1988 1090000.0445544706 1989 2720000.0807642913 1990 8780000.122264037 1991 11609999.958425764 1992 8189999.876543887 1993 6120000.120252371 1994 12209999.89844858 1995 12659999.970346687 1996 9289999.987930056 1997 13880000.09767712 1998 12859999.926760787 1999 17069999.931380134 2000 18340000.160038467 2001 13110000.085085627 2002 8740000.141784558 2003 9240000.113844872 2004 5520000.034943232 2005 7240000.09149313 2006 6789999.864995475 2007 6869999.954476958 2008 8799999.937415123 2009 2029999.550431966 2010 9960000.17039477 2011 5520000.08709729 2012 3429999.9400973306 2013 8659999.996423721 2014 3319999.918341632 2015 3960000.0791251683 2016 3790000.082924959 2017 3940000.0423193 2018 2699999.913573263 2019 3350000.0573694715 2020 2590000.0035762787 2021 2850000.0480562467 2022 2949999.9955296493