Year	current US$
2004	255124037790.22
2005	296844804476.029
2006	343431063457.74
2007	419950959964.689
2008	514422433492.275
2009	560099388997.518
2010	638944727901.865
2011	714468496369.236
2012	791721593162.143
2013	940331649848.188
2014	977248320345.959
2015	920195173072.13
2016	915494682155.106
2017	975143182208.009