Year	current US$
1990	740000.009536743
1991	850000.023841858
1992	1090000.0333786
1993	620000.004768372
1994	800000.011920929
1995	1299999.95231628
1996	1580000.04291534
1997	2230000.01907349
1998	2650000.09536743
1999	2130000.1144409203
2000	1299999.95231628
2001	740000.009536743
2002	1730000.01907349
2003	660000.026226044
2004	980000.019073486
2005	479999.989271164
2006	379999.99523162795
2007	270000.010728836
2008	270000.010728836
2009	129999.995231628
2010	519999.980926514
2011	680000.007152557
2012	280000.001192093
2013	349999.99403953605
2014	100000.00149011599
2015	90000.0035762787
2016	109999.999403954
2017	109999.999403954