Year	current US$
1990	13619999.8855591
1991	315679992.675781
1992	147509994.506836
1993	114650001.52587901
1994	157339996.33789098
1995	113069999.69482401
1996	180020004.272461
1997	219470001.220703
1998	238800003.05175802
1999	266559997.558594
2000	307140014.64843804
2001	345950012.207031
2002	326809997.558594
2003	419410003.66210896
2004	618369995.117188