Year	current US$
1995	4784489760.472174
1996	5144204443.357325
1997	5180066441.873782
1998	5811595360.074381
1999	6130570369.225384
2000	5798746692.234199
2001	6149969886.814071
2002	6318807132.504375
2003	6841585438.422032
2004	9080781759.15371
2005	11177973535.721298
2006	12864429727.691975
2007	16324718051.539871
2008	18727131783.844322
2009	18646843872.26023
2010	22036225279.581852
2011	20618161541.391922
2012	22693591108.89431
2013	24665594703.764385
2014	27670054233.216526
2015	26818535905.193527
2016	28466742339.952328
2017	31615635757.030273
2018	34727976286.30482
2019	37066946846.85556