Year	constant 2015 US$
1991	410000
1992	9660000
1993	32070000
1994	199780000
1995	144290000
1996	116880000
1997	236410000
1998	158090000
1999	221390000
2000	179870000
2001	288680000
2002	438620000
2003	351310000
2004	200000000
2005	228440000
2006	220690000
2007	221700000
2008	214540000
2009	219420000
2010	154130000
2011	242920000
2012	239310000
2013	-61270000
2014	199880000
2015	71860000
2016	77510000
2017	115330000