Year	current US$
1990	2094592511.32249
1993	847915846.400926
1994	960565641.682168
1995	1287272399.26675
1996	1502246253.80776
1997	1395627753.72259
1998	1327187326.28032
1999	1319656104.74564
2000	1154115811.8001
2001	1242283335.54373
2002	1093917351.93578
2003	1113541050.42974
2004	1259984010.95602
2005	1387321458.97138
2006	1482392250.24194
2007	1743671574.08584
2008	1957637563.06261
2009	2008124289.47482
2010	2201775764.44839
2011	2755280241.72307
2012	2972825887.83242
2013	2305400141.04756
2014	2030111658.37878
2015	1844441712.28039
2016	1871911759.54878
2017	1913912112.2695
2018	1315453427.73614
2019	1163025487.04756
2020	923427537.408808
2021	1285524609.83422