Year	constant 2011 international $
1990	14007.8048548578
1991	13276.5103343096
1992	11721.4491637319
1993	10970.627971911
1994	9760.67921985999
1995	9529.1248674557
1996	9500.4544346061
1997	9724.42049335201
1998	9528.62490859456
1999	9767.14633421863
2000	10550.2110464296
2001	10942.3526450626
2002	11497.8886596672
2003	12141.8514631063
2004	13107.6106641615
2005	13944.9307569945
2006	14957.4583405473
2007	16097.9562651239
2008	16766.3232183212
2009	15851.8300532708
2010	16499.2753384178
2011	17287.0100041401
2012	17782.5066959975
2013	18280.9426971612
2014	18581.679054522
2015	18698.8388487293
2016	18895.5985485803
2017	19497.3004307916
2018	19999.8266071383