Year	current US$
1980	157.312681846133
1981	435.460454134957
1982	503.761409165857
1983	599.21622050925
1984	943.316021682021
1985	1338.51668324512
1986	1571.21952946297
1987	2351.82634800919
1988	3422.54809116012
1989	4208.30126124189
1990	4662.96075837218
1991	4542.75537460979
1992	112357.131846219
1993	62739.8980453698
1994	95419.7255825196
1995	161833.676298788
1996	135485.242378732
1997	97239.3156690013
1998	73644.5744074244
1999	56684.0978136634
2000	76453.0163219075
2001	202354.659611282
2002	148482.684619227
2003	126135.141815743
2004	147764.800035442
2005	344986.989717654
2006	429323.364945104
2007	636659.00145105
2008	1585283.40773618
2009	299471.97948178
2010	805552.140122613
2011	1028126.21588379
2012	750552.24628682
2013	0
2014	0
2015	0
2016	0
2017	0
2018	0
2019	0
2020	0
2021	0