Year	constant 2011 international $
1990	17472.9464831615
1991	17616.9266770048
1992	17515.8219531784
1993	18074.531028253
1994	18871.8073199694
1995	17663.7713661403
1996	18427.1118463966
1997	19020.3077276974
1998	19506.70985753
1999	19837.1773450396
2000	20790.9859994328
2001	19454.8909142612
2002	19382.2667984897
2003	20295.9071373366
2004	21183.4268568734
2005	22229.3937758948
2006	24683.4535323922
2007	26544.688973682
2008	26110.658805583
2009	22592.4133301401
2010	20660.4182793806
2011	19953.1927712162
2012	20388.7986581031
2013	20121.2501409281
2014	20820.551057436
2015	21426.3249312141
2016	22393.9961461543
2017	22855.748016777
2018	23768.4784336352