Year	current US$
1990	17019068506.5213
1991	16021138779.3721
1992	11410231059.6257
1993	3150994491.51044
1994	4514184905.55552
1995	6983482126.89454
1996	6619998309.76965
1997	9263147740.10456
1998	7652473449.61734
1999	15808009555.418
2000	17306373203.0822
2001	8910681335.82181
2002	11022563584.9019
2003	9135931051.57381
2004	14093684810.6387
2005	26683402721.8111
2006	72227682418.3991
2007	22132889835.7271
2008	44439619739.7387
2009	28664394525.4735
2010	22076283178.4467
2011	23513928489.4587
2012	70368797024.0593
2013	15096423897.4351
2014	42036407692.8672
2015	18481152034.2156
2016	11498400448.6074
2017	15617108396.0773
2018	15050431838.8928
2019	31203626993.5268
2020	59939638492.3818
2021	78246107145.0803