Year	current US$
1991	230000.004172325
1992	150000.005960464
1993	430000.00715255697
1994	430000.00715255697
1995	460000.00834465
1996	540000.021457672
1997	589999.973773956
1998	920000.016689301
1999	819999.992847443
2000	569999.992847443
2001	680000.007152557
2002	660000.026226044
2003	529999.971389771
2004	709999.978542328