Year	constant 2011 international $
1990	13752.6188740783
1991	12935.1693995105
1992	11457.0144728201
1993	10701.5722311095
1994	9511.4182538874
1995	9311.29672204189
1996	9247.9157721408
1997	9458.15521294364
1998	9277.47675633949
1999	9503.56006568094
2000	10267.3603946957
2001	10610.0446478184
2002	11194.4262532078
2003	11943.8157744525
2004	12930.7689913442
2005	13833.3320473609
2006	14967.9802633184
2007	16124.1246970489
2008	16830.5803033952
2009	15761.6681090231
2010	16450.6380065502
2011	17293.5986619777
2012	17817.1301571216
2013	18370.0295405117
2014	18621.5257885917
2015	18580.8121599079
2016	18771.1893493236
2017	19363.8431754465
2018	19807.5949903462