Year	current US$
1990	556640014.648438
1991	1434719970.70313
1992	2922750000
1993	3077309814.45313
1994	2467870117.1875
1995	2638010009.76563
1996	2094159912.10938
1997	1451589965.82031
1998	1930770019.53125
1999	2816760009.76563
2000	2453889892.57813
2001	1998090087.89063
2002	2133959960.9375
2003	2046140014.64844
2004	2376750000