Year	current US$
1985	2568548.128183
1986	2128384.814313179
1987	2953938.787374459
1988	2108337.19149545
1989	5382352.94117642
1990	6545778.357375599
1991	7938843.5420685
1992	6702746.644306
1993	6709778.4001977295
1994	6391925.988225421
1995	4328198.3524018
1996	4485598.520214959
1997	3052071.68045107
1998	2489024.2109435997
1999	1942109.34900743
2000	2041146.7053958802
2001	2330694.5637600003
2002	3742469.1041893703
2003	2247603.03707672
2004	3990008.1751294006
2005	6522327.040003102
2006	5575281.128267396
2007	6552822.502260998
2008	3250088.380262196
2009	2465250.657932602
2010	7285079.944586605
2011	19587044.89826159
2012	12699985.138706103
2013	28105946.651562706
2014	30424848.201378793
2015	19289635.739921704
2016	17543407.5763314
2017	17275035.977268502
2018	24322935.929044798