Year	US Dollars
1989	4508116731.58355
1990	1123160483.74842
1991	1481481481.48149
1992	64753026634.3826
1993	33548198883.8153
1994	18027556763.0506
1995	13428951157.3818
1996	16544404557.5152
1997	8919619706.13656
1998	18073158165.8939
1999	33395613322.502
2000	52012086740.13511
2001	38865272540.2811
2002	37240829346.09249
2003	48937833963.2477
2004	72422769871.5724
2005	104615972055.267
2006	125993895038.79999
2007	112060607955.967
2008	153406644697.39902
2009	90978689619.53847
2010	123146480329.55901
2011	165215112499.702
2012	147144274606.19101
2013	123874347852.03401
2014	132220896237.96802
2015	109959844234.35698
2016	66453511175.00469
2017	84414872100.7562