Year	current US$
1990	24831355.110026
1991	6930672.95634805
1992	23429157.1688869
1993	24007792.5870584
1994	18911634.5341799
2001	22623955.7376105
2002	22845276.9441695
2003	16795723.228485
2004	22274831.6450947
2005	13858431.4078863
2006	24927231.6809931
2007	12935086.0864106
2008	7106556.11491136
2009	3373864.86578668
2010	14842876.4197107
2011	38034046.9489152
2012	65105810.1497707
2013	39833230.4929031
2014	37618482.294584
2015	9881617.74370702
2016	27476396.0171931
2017	63356396.2645592
2018	72913473.5616835
2019	107901131.436283
2020	75668387.9567771
2021	-16579237.5538362