Year current US$ 1970 89999.99985098839 1971 80000.0000745058 1972 109999.9975413084 1973 260000.0072270628 1974 160000.0038743019 1975 500000.0093132252 1976 410000.01132488303 1977 980000.0078976151 1978 3280000.0458955807 1979 4340000.029653307 1980 929999.9810755247 1981 2010000.0649690656 1982 500000.001862645 1983 400000.0134110454 1984 240000.00208616233 1985 420000.0055134292 1986 400000.00409781974 1987 569999.9909847974 1988 520000.0051409009 1989 129999.9989569188 1990 1800000.0230968015 1991 170000.0036507845 1992 22900000.028312206 1993 13740000.100806354 1994 700000.0067055222 1995 2489999.9964982267 1996 8009999.886155131 1997 11150000.104680663 1998 5700000.043958418 1999 9230000.056326393 2000 4419999.990612263 2001 10439999.87654388 2002 7109999.829903243 2003 4789999.932050703 2004 6800000.078976156 2005 6230000.047013167 2006 6579999.962821595 2007 4109999.984502791 2008 3259999.9494850696 2009 5299999.842420225 2010 4110000.2098828554 2011 3740000.0207126183 2012 2769999.9101459966 2013 3010000.070556996 2014 3480000.01907349 2015 5270000.0107288435 2016 11869999.93026256 2017 12750000.387430191 2018 16260000.295937095 2019 7319999.990984801 2020 9210000.22441148 2021 8600000.128149992 2022 64370001.37567519