Year	current US$
1990	106400001.5
1991	125400001.5
1992	93800003.05
1993	94300003.05
1994	68400001.53
1995	61200000.76
1996	59599998.47
1997	41400001.53
1998	42700000.76
1999	27000000
2000	60504001.62
2001	63604000.09
2002	64304000.85
2003	59994068.15
2004	108315467.8
2005	109495910
2006	120440000
2007	318720000
2008	336840000
2009	336840000
2010	338320000
2011	333420000
2012	337707048
2013	333295533
2014	335395533
2015	333389518
2016	332700000