Year	constant 2011 international $
1990	31341.9023811581
1991	32098.4915397552
1992	32411.8024585346
1993	32314.9708748054
1994	32964.1016119637
1995	33791.8014680143
1996	34539.0855902146
1997	35222.2593769414
1998	36443.7092612023
1999	37666.411617272
2000	38844.404713666
2001	39186.3370023663
2002	39638.0268737228
2003	39816.7741226218
2004	40652.8107017009
2005	41282.8799941074
2006	42498.0073262324
2007	43939.4252883758
2008	44441.7885303671
2009	42656.8541604126
2010	43336.1978527647
2011	44452.7327457999
2012	44551.6175741173
2013	44301.104028751
2014	44246.8932651257
2015	44253.7542473183
2016	44670.654569154
2017	45493.0453463098
2018	46473.2571552366