Year	constant 2010 US$
1989	6465.63956146058
1990	6333.21370197546
1991	5964.27836810472
1992	5387.67742769002
1993	5123.58996838043
1994	4664.48970307745
1995	4646.56733133375
1996	4682.34802577974
1997	4831.57853746835
1998	4792.94620010431
1999	4906.70172627125
2000	5274.9445582196
2001	5408.53376677017
2002	5683.07496585433
2003	6033.51843610482
2004	6503.26523836991
2005	6929.79564186188
2006	7468.45037833721
2007	8020.7159125252
2008	8349.05689900205
2009	7908.35934902414
2010	8249.42246508424
2011	8684.05444718056
2012	8928.46748551621
2013	9201.36295084733
2014	9364.82189085225
2015	9427.0130570093
2016	9557.76485001307
2017	9901.04830583641
2018	10160.5399948337