Year	current US$
1995	11688895767.86251
1996	15405502865.021183
1997	17128197221.487358
1998	17277259293.475006
1999	12237090486.257574
2000	15053966053.912413
2001	18214455565.79122
2002	21271633545.927494
2003	24141885234.84256
2004	31169358493.05787
2005	36696508849.56034
2006	38464787966.62488
2007	46423572461.82233
2008	56199311684.66198
2009	49449505737.70816
2010	48368953640.661095
2011	56658730081.522385
2012	59102040142.65481
2013	65137184638.6991
2014	63676513478.63579
2015	54961514901.31257
2016	48389778143.63614
2017	57569971404.83387
2018	65713210430.24041
2019	70450632230.11285