Year	constant 2010 US$
1997	131.284257214531
1998	126.444811485875
1999	149.561417247781
2000	148.796974222973
2001	134.412240251628
2002	125.395554268241
2003	85.9536726907225
2004	106.975134560962
2005	121.026515792763
2006	135.731967108843
2007	118.208966114555
2008	120.369712996884
2009	127.715028106069
2010	149.049398763064
2011	143.884832631587
2012	165.894056172626
2013	171.213806576548
2014	173.235234330054
2015	190.401934477877
2016	173.673482327611