Year	current US$
2001	456000000
2002	398000000
2003	469000000
2004	382000000
2005	374000000
2006	408000000
2007	430000000
2008	459000000
2009	477000000
2012	591000000
2013	624000000
2014	616000000
2015	459000000
2016	499000000
2017	504000000
2018	585000000