Year	current US$
1979	139800000
1980	140600000
1981	159600000
1982	136200000
1983	146800000
1984	192400000
1985	150100000
1986	177400000
1987	152100000
1988	114200000
1989	96500000
2008	688890546.6728674
2009	789495791.5999984
2010	1056503689.9417884
2011	1519608093.9603581
2012	1735005013.8936
2013	1456533281.4999409
2014	1453639266.54777
2015	1172512975.766637
2016	1071779849.3426018
2017	1192899875.5968325
2018	1311322353.1922228
2019	1160038557.824669
2020	1042224098.2383152