Year	current US$
1990	151954691.342383
1991	191882617.566578
1992	196652415.641203
1993	232905810.342664
1994	270761750.627694
1995	291220040.339647
1996	333308311.338191
1997	420359390.974879
1998	453657471.624652
1999	514779217.715204
2000	531975778.65408
2001	556005992.237168
2002	654964762.793345
2003	729987586.512461
2004	817854491.023173
2005	896681151.150376
2006	1073406248.37692
2007	1283284401.5695
2008	1423473737.17427
2009	1493276972.13034
2010	1731269988.68168
2011	2033997786.83131
2012	2332739301.2943
2013	2462224596.23195
2014	2749554136.40803
2015	2948039548.43922
2016	3121432232.56473
2017	3275492339.78933
2018	3385827126.74127
2019	3750437393.55639
2020	3755501103.60078
2021	4089489810.83358