Year current US$ 1970 739999.9909102911 1971 1140000.0117719176 1972 1400000.0208616261 1973 1329999.9758601182 1974 1970000.0453740344 1975 3790000.1406669593 1976 4380000.071600077 1977 3630000.11071563 1978 3600000.0070780483 1979 5190000.027418137 1980 10110000.176355239 1981 12109999.658539845 1982 5659999.778494239 1983 4829999.864101414 1984 6090000.126510853 1985 4210000.077262525 1986 23569999.74697829 1987 43490000.547841206 1988 28810000.529512744 1989 39379999.64505433 1990 28219999.37295907 1991 10129999.686032541 1992 1179999.85255301 1993 2599999.843165273 1994 719999.8069554577 1995 -2220000.0435113967 1996 -12759999.80419875 1997 919999.845325999 1998 -9129999.734461315 1999 -5209999.890998013 2000 2269999.9641627087 2001 -2780000.0663846815 2002 -190000.02928078157 2003 -1900000.0283122098 2004 -4640000.44390564 2005 -12889999.74541367 2006 -6720000.134780998 2007 -7030000.183731314 2008 -6239999.976009129 2009 -5340000.068768868 2010 -4559999.780729417 2011 780000.2954900237 2012 -3069999.9183416385 2013 -2110000.081360341 2014 399999.88116323756 2015 319999.93138015474 2016 839999.9625980812 2017 579999.9721348262 2018 309999.9632686376 2019 220000.0267475846 2020 509999.9811500311 2021 1159999.9964237213 2022 1350000.0350177253