Year	current US$
1990	61373722.7794401
1991	57475251.6622908
1992	60069215.9324055
1993	54824357.6754068
1994	38614107.9518766
1995	43617722.342792
1996	49696524.3483445
1997	42119915.0768377
1998	34878328.9657904
1999	44396987.2173047
2000	55884053.3307551
2001	45457140.5981075
2002	46762116.4902441
2003	53879571.1839601
2004	69767380.7058658
2005	93805149.8578884
2006	106825503.667104
2007	124501026.779616
2008	155269757.518827
2009	116591498.288468
2010	143435897.018545
2011	167008721.144849
2012	176426309.395602
2013	183935355.502542
2014	174308908.561976
2015	118372023.656864
2016	109456917.520754
2017	116482170.181773
2018	141246057.319018
2019	122384688.973122
2020	98672533.7124574
2021	120164357.962163