Year	current US$
1990	38533964.7901738
1991	22288101.1058642
1992	19825992.85756
1993	26641844.6508767
1994	32362545.6401949
1995	32255867.9851262
1996	36132276.348505
1997	37582348.0706173
1998	39031661.7095927
1999	37099605.6905095
2000	30255426.3505286
2001	30468740.2377785
2002	33252056.7074905
2003	42025765.7595299
2004	42801126.8531112
2005	51418405.0641683
2006	55914237.8339835
2007	63610523.6226646
2008	68436234.9031415
2009	69043692.4615556
2010	75732345.59992
2011	90081728.3693948
2012	87928234.9985025
2013	128008529.990752
2014	173067686.263035
2015	112316205.883379
2016	86905964.1058747
2017	106638710.970912
2018	122237681.922928
2019	130900337.246856
2020	129967570.74114
2021	138943431.49982