Year	constant 2015 US$
2005	444010000
2006	515170000
2007	407880000
2008	554110000
2009	607050000
2010	623630000
2011	670980000
2012	707300000
2013	703110000
2014	1235990000
2015	1443880000
2016	1523320000
2017	1133700000