Year	constant 2011 international $
1990	24872.6377922924
1991	25053.4263667347
1992	25204.9863077003
1993	25100.8426967441
1994	25755.6388447629
1995	26422.3916834717
1996	26925.1590830028
1997	27662.5043069571
1998	28449.2629514666
1999	29228.4452387882
2000	30308.3962487357
2001	30959.3183189552
2002	31339.2665958882
2003	31664.9532426136
2004	32406.7741117536
2005	33005.6118704114
2006	34043.4849917668
2007	35031.9763426386
2008	35163.5233196144
2009	33556.2316259769
2010	34147.6837735566
2011	34760.0646642374
2012	34550.9459559596
2013	34547.3882918146
2014	35073.5836419209
2015	35813.8433322384
2016	36453.8051043248
2017	37349.7224579423
2018	38079.6947014028