Year	current US$
1990	375160864.749616
1991	403107207.931924
1992	422106104.690348
1993	443797043.789604
1994	480605768.285609
1995	511354873.982214
1996	554240468.041825
1997	595522933.964804
1998	657717738.106382
1999	709507770.071611
2000	789425326.802443
2001	869814609.845371
2002	885310837.827417
2003	926458009.375148
2004	985970228.798695
2005	1085370422.30684
2006	1158994219.01007
2007	1193920599.11464
2008	1228631689.76911
2009	1120164904.42311
2010	1148559530.61248
2011	1094105246.67171
2012	1153630935.48655
2013	1154339506.24745
2014	1196321953.57735
2015	1288680718.17375
2016	1394086526.32566
2017	1413617721.09472
2018	1475471554.94225
2019	1457846417.74539
2020	1488165478.67659
2021	1676172163.15467