Year	current US$
1990	757142857.1428572
1991	664150943.3962264
1992	545722713.8643068
1993	447694457.382394
1994	436791742.01326096
1995	261357541.11087587
1996	284157360.4060914
1997	299396798.6940123
1998	559059391.5982617
1999	433162599.2089139
2000	270921131.8482842
2001	336861434.4875963
2002	404575322.53332233
2003	501801972.7788272
2004	816560669.0842105
2005	939559457.5698197
2006	1156648904.5624435
2007	1594575775.6828427
2008	2267450757.49295
2009	2342187767.0354753
2010	2544184507.442052
2011	2767720934.288292
2012	3321796109.0046077
2013	3722445984.484806
2014	3746237772.5709853
2015	3240568043.735013
2016	2598282853.7426577
2017	2929866187.775023
2018	2853325410.161293
2019	3077929737.6480885
2020	2867396464.735028
2021	2983044252.9523344
2022	3654439843.804888