Year	constant 2015 US$
1990	11570000
1991	223220000
1992	502380000
1993	301060000
1994	386480000
1995	539470000
1996	443170000
1997	546480000
1998	778490000
1999	1079350000
2000	731890000
2001	923380000
2002	751400000
2003	1100930000
2004	1095900000