Year	current US$
1995	230000000
1996	237000000
1997	253000000
1998	283000000
1999	263000000
2000	281000000
2001	233000000
2002	210000000
2003	282000000
2004	326000000
2005	382000000
2006	294000000
2007	302000000
2008	311000000
2009	296000000
2010	309000000
2011	321000000
2012	337000000
2013	354000000
2014	778000000
2015	810000000
2016	776000000
2017	875000000
2018	989000000