Year	current US$
1990	3998807.66690483
1991	5507979.00892047
1992	6697970.55998649
1993	6590351.04521687
1994	6589658.61451932
1995	7032084.96358202
1996	5730228.84822106
1997	7615806.2169533
1998	7703617.44268276
1999	7277913.07804254
2000	8352725.06609686
2001	10285625.6853647
2002	10479435.8203101
2003	10716570.0682857
2004	9707471.73085417
2005	10935135.7021363
2006	12507132.070142
2007	13649220.7731147
2008	13418869.8397774
2009	40321517.4510715
2010	16003815.9208575
2011	19985019.8318145
2012	20816933.0405171
2013	14869677.8527018
2014	16161962.9780733
2015	23645517.137165
2016	23342509.4280689
2017	23946938.8700571
2018	24682609.568356
2019	26098508.7133535
2020	23180591.5585926
2021	28257718.4839249