Year	current US$
1987	26263027.4896669
1988	29914565.3290048
1989	31224892.9447609
1990	35762979.3891344
1991	41445280.6185031
1992	35169204.2352756
1993	38532633.8644945
1994	23818242.359032
1995	75538653.5215778
1996	184577365.705603