Year	constant 2015 US$
1990	2886340000
1991	5580150000
1992	5593860000
1993	5660610000
1994	5813100000
1995	7891090000
1996	4224990000
1997	3397240000
1998	4300830000
1999	6159650000
2000	7298310000
2001	6247240000
2002	5582390000
2003	5852650000
2004	6504760000