Year	constant 2011 international $
1990	3530.05420623553
1991	3662.07168079083
1992	3687.63872801448
1993	3764.26235738758
1994	3879.14153719231
1995	3975.84615210379
1996	4074.92627696224
1997	4204.82446190653
1998	4353.79062534895
1999	4268.38213306189
2000	4279.09021047092
2001	4272.75483724749
2002	4296.43685562015
2003	4279.50126350106
2004	4343.78714960892
2005	4475.99796402312
2006	4625.67398730249
2007	4742.91371051223
2008	4974.59573692515
2009	5027.91061496348
2010	5110.9345186386
2011	5257.10488564999
2012	5360.18148279631
2013	5626.84027569606
2014	5932.13144728441
2015	6260.46103371405
2016	6534.82916266752
2017	6639.54264576191
2018	6849.20186952671