Year	current US$
1995	6947962036.846751
1996	7728682915.867622
1997	8343158545.426007
1998	8820855796.89405
1999	9174543919.016888
2000	8236189717.380535
2001	8823939169.118773
2002	9778100648.78814
2003	13873282499.901196
2004	16114153054.484451
2005	18290611481.124107
2006	20483792702.91495
2007	24226010745.356438
2008	24528071972.20714
2009	22718361774.776825
2010	25446513188.809254
2011	28090887999.97195
2012	30407598946.54308
2013	30395296704.695515
2014	31525801556.395424
2015	28744759940.093887
2016	29035443371.12732
2017	33098286015.64024
2018	35520914706.53931
2019	34919262972.83545