Year	current US$
1990	14177590.8190262
1991	14602549.0003938
1992	14467616.4095708
1993	15284005.6155029
1994	20647596.9921605
1995	23389326.0745228
1996	25149337.722748
1997	28476492.8112167
1998	29958512.2770996
1999	30886753.0629123
2000	30812274.6882684
2001	31827219.1018833
2002	32647474.4261026
2003	34040870.3654164
2004	36844266.9585696
2005	34434044.869748
2006	32616640.198222
2007	41462729.8608046
2008	42940384.1271493
2009	45016487.3532439
2010	50297706.6931534
2011	54585949.6102732
2012	62140097.0805365
2013	64004264.995376
2014	69361757.4045978
2015	72327460.7705397
2016	89060655.3080083
2017	92420220.3378911
2018	101472947.85298
2019	116219920.322889
2020	175976633.243846
2021	229981880.668149