Year	constant 2010 US$
1991	540.590477830348
1992	527.154677059188
1993	540.977830271961
1994	519.682028120543
1995	535.340947739706
1996	564.528304196933
1997	573.356194954518
1998	571.336914645424
1999	576.789350773549
2000	580.445041913532
2001	595.189446949369
2002	603.329528648595
2003	613.648534068015
2004	624.006662501101
2005	651.515182609366
2006	693.84448044121
2007	728.142531673946
2008	770.640105342166
2009	792.376477535039
2010	807.035178810383
2011	817.733968376757
2012	854.374844125586
2013	863.522497126699
2014	880.548560307228
2015	890.687146563457
2016	894.240246701945
2017	914.163901656766
2018	952.801478451339