Year	current US$
1975	405692196.7653471
1976	242460722.1012982
1977	366236293.06868666
1978	198081401.58178824
1979	331885059.5669821
1980	281118672.19917065
1981	240820930.23255813
1982	224196078.43137258
1983	172712698.41269842
1984	297639204.1748206
1985	361885294.1176471
1986	397403275.0112158
1987	384208163.2653061
1988	517910403.4810127
1989	598979636.8352789
1990	620323399.5584989
1991	783309569.4040204
1992	444799256.03754145
1993	766192019.5464846
1994	1039021245.6052235
1995	1139386600.3969512
1996	1254546337.7500045
1997	717459030.4498136
1998	1349139265.2898781
1999	722661477.3311131
2000	760675122.4529309
2001	1121051361.1520233
2002	1156428644.6403852
2003	1614800994.4990792
2004	2031330502.448596
2005	2063742612.7789273
2006	3636405900.1122274
2007	1674301642.1303875
2008	1244964532.4653726
2009	2874789711.309945
2010	1568302992.8957198
2011	1526955864.4371147
2012	2173994771.5504746
2013	9546085065.233301
2014	9988590914.048428
2015	10426176037.738573
2016	10466445257.72731
2017	9580157442.4559
2018	13458358322.691801
2019	12021085684.25805
2020	14761946263.080086
2021	12401408698.716887
2022	13241024951.055574