Year	current US$
1995	2379258890.15567
1996	2661237695.77935
1997	2728471076.47966
1998	3070658879.7454
1999	3358658585.13329
2000	5301402242.38398
2001	5872384236.68958
2002	5776049840.46227
2003	6600913108.15859
2004	8646012061.40079
2005	11307249757.1801
2006	12323778334.037
2007	14608630677.3629
2008	16607000000
2009	12682000000
2010	14452000000
2011	18265000000
2012	19014000000
2013	19693000000
2014	23541000000
2015	24480000000
2016	26406000000
2017	30053000000