Year	current US$
2000	173000000
2001	168000000
2002	172000000
2003	202000000
2004	206000000
2005	174000000
2006	239000000
2007	331000000
2008	383000000
2009	427000000
2010	431000000
2011	458000000
2012	473000000
2013	418000000
2014	475000000
2015	503000000
2016	503000000
2017	485000000
2018	599000000
2019	554000000