Year	constant 2010 US$
1991	33174620840.7698
1992	32287693515.1382
1993	28967798463.335
1994	20976605377.2825
1995	21472046077.8847
1996	22279349005.2053
1997	22445233168.3533
1998	21938733523.5413
1999	23794424361.9576
2000	22801331171.9112
2001	21945368890.0672
2002	21708707483.976
2003	22226266072.9979
2004	29576040394.8779
2005	21334915169.6823
2006	20067560163.2312
2007	25176792388.1914
2008	30237365258.6282
2009	29248695646.2657
2010	22117888419.7412
2011	19835322334.8239
2012	19667226382.8339
2013	20680225672.458
2014	23577669055.4441
2015	20189208549.5397
2016	19753486147.6708
2017	20341821979.636
2018	19861863800.9276