Year	current US$
1988	699999.988079071
1989	1059999.9427795399
1990	5739999.771118159
1991	4489999.771118159
1992	18209999.084472697
1993	13810000.4196167
1994	8340000.152587891
1995	13329999.923706101
1996	4699999.80926514
1997	-3279999.97138977
1998	-4039999.96185303
1999	-4820000.17166138
2000	-1590000.0333786
2001	-2890000.10490417
2002	1740000.0095367401
2003	1970000.02861023
2004	3380000.1144409203
2005	4130000.11444092
2006	4309999.94277954
2007	6699999.80926514
2008	7139999.8664856
2009	9560000.4196167
2010	11260000.2288818
2011	8220000.26702881
2012	829999.983310699
2013	870000.004768372
2014	1200000.04768372
2015	870000.004768372
2016	769999.980926514
2017	959999.978542328