Year	constant 2011 international $
1990	5122.53160723357
1991	4605.98274375184
1992	4131.97971276804
1993	3966.23452351895
1994	4020.17102746393
1995	4243.87126315492
1996	4303.98701462688
1997	4435.00826039059
1998	4544.35929850922
1999	4643.35915229581
2000	4655.05755406877
2001	4748.59553560635
2002	4925.13813970901
2003	5215.70981324364
2004	5706.041339458
2005	6047.18739304773
2006	6481.39650177668
2007	7049.29014904541
2008	7565.63724802659
2009	7352.61115813887
2010	7688.0637252648
2011	8853.12541902053
2012	9752.5314682026
2013	10672.8748444524
2014	11286.0699560905
2015	11329.8779732218
2016	11245.0382946779
2017	11622.8536943867
2018	12209.2467768494