Year	current US$
1995	51064652349.3659
1996	53836823268.1494
1997	59791075595.576
1998	56010200719.9482
1999	52485737806.0946
2000	59433146164.1911
2001	63135699872.499
2002	67914824098.1699
2003	73479194871.2675
2004	90070797835.342
2005	101958333230.903
2006	119335082640.112
2007	145554345130.458
2008	172149560539.775
2009	161603389456.205
2010	191484513054.842
2011	238664929081.666
2012	290969732972.143
2013	339191632399.152
2014	442465583003.684
2015	434586993595.2
2016	427749878672.332
2017	457901569638.061