Year	constant 2011 international $
1995	2256.93846458837
1996	2245.9026211001
1997	2302.88795299227
1998	2376.32244885075
1999	2444.42395431104
2000	2487.220766274
2001	2552.91440226442
2002	2630.17414355133
2003	2719.44503966281
2004	2909.89114033276
2005	3083.65853115189
2006	3262.03242412219
2007	3684.51477310584
2008	4005.05546097795
2009	4134.33963658352
2010	4372.93513846124
2011	4645.47361828314
2012	4979.82197040173
2013	5351.345363107
2014	5573.31200445612
2015	5758.97431448452
2016	5968.20371312345
2017	6189.68658394558
2018	6461.84249037865