Year	current US$
1993	3247216433.87511
1994	4576921699.92946
1995	6663951971.65396
1996	7121825574.93409
1997	4384031400.14223
1998	5707244287.24601
1999	4439011038.44816
2000	3848477997.68985
2001	4609735632.63029
2002	5064616672.39499
2003	5193393105.89973
2004	7709928682.30047
2005	11117819803.6098
2006	13189420220.2618
2007	18904419337.0798
2008	21033477496.9291
2009	9067112755.63322
2010	7169617870.31639
2011	7628022702.09246
2012	9877619460.57219
2013	9619455564.53549
2014	12242430074.0003
2015	18229859518.2833
2016	17590550432.3679
2017	19228665226.4119
2018	22374091394.519
2019	23289009281.5469
2020	20056699445.2101
2021	26058467684.4358