Year	current US$
1995	3393305257.42065
1996	3393081645.87156
1997	3669689132.09425
1998	4146428954.75131
1999	4485632496.27766
2000	4340143761.02323
2001	4676510474.84266
2002	4613695004.18964
2003	5147018613.08889
2004	6279498794.017
2005	6944750208.26424
2006	7039766416.11534
2007	7885722194.54044
2008	8832019592.96638
2009	8425294208.02182
2010	8267220138.91437
2011	16219974959.6296
2012	14683652644.9355
2013	14845896418.1211
2014	14403174543.1127
2015	13030342616.1581
2016	13843400682.7535
2017	13296518574.3995