Year	current US$
1988	899999.976158142
1989	119999.997317791
1990	5579999.92370605
1991	2240000.00953674
1992	600000.023841858
1993	170000.00178813902
1994	8210000.038146971
1995	4880000.11444092
1996	19999.9995529652
1997	-449999.988079071
1998	680000.007152557
1999	36490001.6784668
2000	1340000.0333786
2001	9489999.77111816
2002	7260000.228881841
2003	34720001.220703095
2004	18329999.9237061
2005	82480003.3569336
2006	18120000.8392334
2007	41560001.373291
2008	59119998.9318848
2009	59259998.3215332
2010	45569999.6948242
2011	36840000.1525879
2012	13149999.6185303
2013	19530000.6866455
2014	11699999.8092651
2015	12609999.6566772
2016	7630000.11444092
2017	9529999.73297119
2018	16110000.610351602
2019	16809999.4659424
2020	17690000.5340576
2021	24219999.3133545
2022	20500000