Year	current US$
1981	50000.0007450581
1982	150000.005960464
1983	109999.999403954
1984	140000.000596046
1985	430000.00715255697
1986	670000.016689301
1988	330000.013113022
1989	300000.011920929
1990	159999.99642372102
1991	29999.999329447703
1993	3450000.04768372
1994	4110000.1335143996
1995	4010000.2288818406
1996	1789999.96185303
1997	1340000.0333786
1998	2230000.01907349
1999	1450000.04768372
2000	769999.980926514
2001	610000.014305115
2002	1139999.98569489
2003	750000
2004	899999.976158142
2005	430000.00715255697
2006	319999.99284744303
2007	579999.983310699
2008	740000.009536743
2009	610000.014305115
2010	370000.00476837205
2015	480592.310428619
2018	164666.667580605
2019	259661.34667396502