Year	current US$
1990	5030000.055208802
1991	4909999.990835786
1992	7840000.042691823
1993	10659999.955445532
1994	12820000.004023299
1995	17829999.877139915
1996	23330000.052228563
1997	31750000.050291434
1998	37980000.17181038
1999	42620000.67532062
2000	39599999.932572246
2001	38490000.128746025
2002	42990000.1268834
2003	52100000.0350177
2004	53170000.25510792
2005	51240000.45284622
2006	59740000.64097344
2007	64920000.862330206
2008	74390000.70467596
2009	65399999.35775995
2010	58140000.60968108
2011	49560000.164434314
2012	49580000.68180265
2013	48379999.98591836
2014	46520000.05170703
2015	33570000.113919385
2016	36240000.34108757
2017	30760000.320151445
2018	29869999.86320734
2019	25190000.16897917
2020	20659999.86603856
2021	17019999.857991938
2022	23330000.085756183