Year	current US$
1992	1309.9427534683439
1993	1345.0430173268992
1994	1230.5110709660808
1995	1420.5470890942288
1996	1568.9650186318852
1997	1647.83182786314
1998	1678.0112086037211
1999	1500.0313070043248
2000	1638.9621755833805
2001	1649.534119458944
2002	1856.536835691685
2003	2273.7930189604435
2004	2969.851160701065
2005	3736.5926874577967
2006	4507.6194505353615
2007	5879.316983219958
2008	7202.250416005741
2009	5698.460857311518
2010	6726.39638264912
2011	8064.052657234778
2012	8417.424461952141
2013	8854.977090721954
2014	8312.267036256371
2015	6564.120802670769
2016	6248.2548905756485
2017	6931.897342447223
2018	7119.180102888454
2019	7217.748149343283
2020	6890.9213483705635
2021	7679.173483967968