Year	current US$
1978	2849999.90463257
1980	180000.00715255702
1981	239999.994635582
1989	519999.980926514
1991	449999.988079071
1992	529999.971389771
1993	759999.990463257
1994	140000.000596046
1995	-39999.9991059303
1996	-180000.00715255702
1997	-180000.00715255702
1998	1759999.9904632599
1999	2839999.91416931
2000	-409999.99642372096
2001	-649999.976158142
2002	-660000.026226044
2003	-1330000.04291534
2004	-460000.00834465