Year	current US$
1990	541050794.931214
1991	484061690.109546
1992	376425945.47124
1993	378173973.807444
1994	491295658.92694
1995	519609930.243811
1996	487228625.122351
1997	504961064.384947
1998	545073731.944487
1999	669035472.954691
2000	714807649.545311
2001	759195616.625411
2002	834525868.533315
2003	973947089.413991
2004	1089222435.41018
2005	1177039400.51657
2006	1273275071.22241
2007	1506049938.96615
2008	1590941175.4431
2009	1446879602.36799
2010	1691260405.44294
2011	1952267842.41915
2012	2144144116.1367
2013	2269888647.88425
2014	2404092098.10154
2015	2552324964.25361
2016	2633753259.63895
2017	2735937929.82611
2018	2862007488.79503
2019	2971560068.95667
2020	3131399508.13307
2021	3402689244.8311