Year	constant 2011 international $
1990	4285.48080986931
1991	4245.18201946044
1992	4209.01023870109
1993	4244.82729088609
1994	4270.29781827664
1995	4360.58233918212
1996	4509.1083337522
1997	4646.14169136849
1998	4669.52743583778
1999	4776.45682890343
2000	4970.70957130484
2001	5084.74304997032
2002	5243.80210843651
2003	5472.03733128393
2004	5816.3797912281
2005	6146.81506678502
2006	6550.16084449086
2007	7012.11096965924
2008	7303.85277835424
2009	7413.47532088851
2010	7858.08436593484
2011	8207.05620889488
2012	8523.60077567489
2013	8855.74821844801
2014	9158.6719128324
2015	9431.7336921505
2016	9761.46725377821
2017	10131.1297924532
2018	10500.1923850001