Year	current US$
1990	969407.919249655
1991	1665202.95618526
1992	1607512.93439676
1993	1822863.05505998
1994	2050116.01340601
1995	2445942.59602853
1996	3183460.47123392
1997	3145659.08961114
1998	3423829.97452567
1999	3550201.50148417
2000	3897938.36417854
2001	4463573.41062997
2002	4836662.75559687
2003	5463349.34834442
2004	6398106.21862848
2005	7445198.62839322
2006	7847612.2506434
2007	8241039.21801488
2008	8051322.22379723
2009	8837592.43754354
2010	11431297.2079979
2011	17598747.5864653
2012	19884830.6213111
2013	21658009.1929265
2014	23569529.4684569
2015	26775069.9310359
2016	33397745.7405031
2017	36294581.106689
2018	41137681.057103
2019	42817864.8704088
2020	41687591.8018418
2021	48422566.9975094