Year	constant 2015 US$
1993	245500000
1994	632380000
1995	611710000
1996	679690000
1997	804730000
1998	821260000
1999	760760000
2000	938470000
2001	1429670000
2002	1345380000
2003	1261840000
2004	1302530000
2005	1093640000
2006	1408660000
2007	1616700000
2008	2238410000
2009	2716170000
2010	2394240000
2011	2192200000
2012	1804110000
2013	2409750000
2014	2226640000
2015	1870640000
2016	2401660000
2017	2072640000