Year	constant 2015 US$
1990	3279550000
1991	6622210000
1992	6453380000
1993	6308690000
1994	6305260000
1995	8371060000
1996	4736670000
1997	3771550000
1998	4726300000
1999	6497240000
2000	6870300000
2001	5854920000
2002	5181880000
2003	5134950000
2004	5874940000
2011	230000