Year	current US$
1990	684175976.106725
1991	373324342.777001
1992	624153253.808279
1993	1135258052.66383
1994	1359491721.68823
1995	1673083663.51523
1996	1573418817.24967
1997	1442907049.47065
1998	1280499525.67295
1999	1390829157.09088
2000	1295573976.60861
2001	1206042818.13469
2002	1724654099.26092
2003	2639957895.24767
2004	2404509239.38574
2005	1114790476.37933
2006	1598954616.07667
2007	1089992511.13656
2008	4620094670.06492
2009	5081153333.01774
2010	5962486118.18914
2011	4522705642.83278
2012	3114294711.86861
2013	3693421500.21536
2014	4734742900.61834
2015	3797810647.9559
2016	2823171079.98143
2017	2317958286.8798
2018	2335594322.51191
2019	4056227262.2496
2020	2443236728.55263
2021	2016904953.64009