Year	current US$
1979	19204300.2770547
1980	11690912.1676345
1981	9089594.25009509
1982	19191029.5799085
1983	25441496.2264636
1984	18413178.3299072
1985	7415019.24579596
1986	6808277.54740642
1987	15133191.2346117
1988	19480282.9764293
1989	18271518.8443783
1990	21190961.9191761
1991	43826544.537704
1992	42724586.816735
2006	-7393065.56924543
2007	2094558.56936594
2008	899809.099742487
2009	-6211817.78370538
2010	9430980.11684464
2011	1698419.55313691
2012	34460556.3388357
2013	35796916.2933782
2014	95295293.6741578
2015	116116533.662346
2016	69530690.9477699
2017	116617710.193766
2018	112170469.603064
2019	105139860.500513
2020	92322268.7568306