Year	constant 2011 international $
1997	10530.9596499697
1998	11080.7544546547
1999	10066.6803503508
2000	10396.7785280501
2001	10468.9188002449
2002	10625.5725940869
2003	10845.9909519376
2004	11305.9864205266
2005	11761.2334806528
2006	12752.8884075586
2007	13602.573294037
2008	14559.1965925723
2009	13686.0854515838
2010	14034.5692635667
2011	14472.4582555656
2012	14066.4204644327
2013	14551.4306082338
2014	14796.6189196818
2015	15289.7050048464
2016	15737.0078260679
2017	16477.3848210942
2018	17278.0475051054