Year	current US$
1990	2524586.218934
1991	2958708.9768665
1992	2760275.73600142
1993	3232852.14697692
1994	4132866.28862815
1995	4202047.546195
1996	4876958.22088439
1997	4808555.89545168
1998	5547689.69776869
1999	4540747.48771521
2000	4652067.91804106
2001	3779738.21928727
2002	4584103.31294321
2003	4813791.06947316
2004	4879223.90603799
2005	5381017.365645
2006	7454161.66865679
2007	8115049.76203591
2008	9400041.27063606
2009	10029657.4345139
2010	10871310.9900367
2011	10518688.3757509
2012	11604922.1501241
2013	12290387.0655361
2014	12777245.1727057
2015	13417090.9882908
2016	8707320.35434324
2017	8519414.79268248
2018	8653509.88157361
2019	8234821.37682134
2020	6751374.69265477
2021	6644669.93350788