Year	constant 2010 US$
1991	519.850217816635
1992	507.927021552784
1993	523.210307889424
1994	502.123969445121
1995	517.436974379685
1996	546.444728451739
1997	555.759850203447
1998	553.570240143517
1999	560.799225647868
2000	565.239432028208
2001	579.778717898108
2002	597.371691904392
2003	608.061881631871
2004	618.077181879472
2005	645.952600963649
2006	666.656953069248
2007	701.941924132745
2008	719.886467937603
2009	741.033943453049
2010	756.115630307002
2011	764.011318710925
2012	802.417393664957
2013	809.018122472605
2014	824.244697664075
2015	834.481526390485
2016	835.345698866286
2017	848.03941985516
2018	896.475894383826