Year current US$ 1970 0 1971 39999.9991059303 1972 50000.0007450581 1973 49999.998882412896 1974 149999.99664723902 1975 69999.9984353781 1976 29999.999329447703 1977 0 1978 29999.999329447703 1979 29999.999329447703 1980 2019999.9809265102 1981 219999.99321997198 1982 -190000.00320374998 1983 -170000.00178813902 1984 -159999.99642372102 1985 -180000.00715255702 1986 -109999.999403954 1987 560000.002384186 1988 5460000.03814697 1989 1260000.0090897102 1990 21600000.3181398 1991 119349995.750934 1992 53840000.3705174 1993 29020000.1709163 1994 41270000.088959895 1995 48590000.2140552 1996 56529999.2598593 1997 65660000.218078494 1998 66670000.694692105 1999 71799999.3171543 2000 53049999.5946884 2001 52990000.3224611 2002 48160000.0206381 2003 55939999.5673448 2004 86649998.68161981 2005 17430000.2474338 2006 21500000.1136214 2007 19709999.9561906 2008 33009999.2081523 2009 27410000.1528859 2010 26910000.0374019 2011 28890000.106766798 2012 24089999.973773997 2013 24779999.8987466 2014 31990000.1324713 2015 27139999.926090203 2016 25310000.570490997 2017 28480000.0414252 2018 19650000.2034009 2019 30759999.893605698 2020 19579999.8641014 2021 17710000.053048097 2022 65520001.01096922