Year	current US$
1995	12780572885.533787
1996	14749928720.140543
1997	17029969159.692972
1998	17765199770.112637
1999	15785654733.506866
2000	17929485782.371925
2001	17072420296.334711
2002	15097927823.18278
2003	15588258432.21589
2004	17589090979.40679
2005	20867417117.487682
2006	23446718213.765167
2007	27793843509.965755
2008	31960640606.976475
2009	30108730786.08282
2010	36569140484.02529
2011	43426778760.45728
2012	46751301335.50375
2013	51415925832.43067
2014	53746921076.51588
2015	47318929931.236755
2016	48468775471.01482
2017	55846022361.467545
2018	55793342213.38961
2019	51957822301.88686