Year	current US$
1990	58108064.8477337
1991	52728095.4066209
1992	78572684.5323747
1993	104438794.329523
1994	115589181.37513
1995	-1986176.51429539
1996	2997881.41889876
1997	4494552.87505734
1998	7578832.60496419
1999	-6554215.18402188
2000	-11028553.7688954
2001	-38135096.686577
2002	-45217685.1795787
2003	-31157080.6431509
2004	-43597908.5574257
2005	24591143.5559735
2006	45311949.802798
2007	-14447529.9527919
2008	3354006.44058865
2009	156836112.837922
2010	141715302.969214
2011	125877651.258163
2012	161150973.779687
2013	179721430.761238
2014	71384511.4313024
2015	138294615.428852
2016	-35136871.5603457