Year	constant 2011 international $
1990	13738.0150384077
1991	13015.6079856328
1992	11486.4735066321
1993	10750.3151577855
1994	9566.07552182136
1995	9338.5903424376
1996	9218.57451133579
1997	9379.21087897455
1998	9100.51823169714
1999	9306.40968514399
2000	10093.1436290836
2001	10497.9147654614
2002	11074.4712682912
2003	11738.1132090272
2004	12756.4226422751
2005	13599.3352038051
2006	14616.8558676577
2007	15770.219597116
2008	16399.2311195969
2009	15377.8425816652
2010	16036.2272770509
2011	16806.2964844318
2012	17330.549715864
2013	17845.136536801
2014	18115.6754120159
2015	18151.3800860718
2016	18306.0215542321
2017	18855.3038152626
2018	19268.6171774216