Year	constant 2011 international $
1990	8501.71963851476
1991	8863.30362299941
1992	8872.77918365457
1993	8812.98398918062
1994	8910.14120951756
1995	9308.62558722708
1996	9618.5186740288
1997	10177.9071192057
1998	9993.41390723876
1999	10725.1016961059
2000	10718.1650867188
2001	10543.9135138449
2002	10987.2906566145
2003	11298.3290602155
2004	11399.4443149231
2005	11696.6015068047
2006	12420.620242718
2007	13165.0311327062
2008	13693.8662994369
2009	12400.8889375325
2010	13235.1642703252
2011	13838.6028216807
2012	14284.1185822187
2013	15727.187060045
2014	16175.2394459843
2015	15659.8968068401
2016	16037.2144759899
2017	16165.338387878
2018	16518.2357509876