Year	current US$
1995	328000000
1996	354000000
1997	375000000
1998	328000000
1999	277000000
2000	291000000
2001	114000000
2002	181000000
2003	300000000
2004	425000000
2005	480000000
2006	575000000
2007	705000000
2008	609000000
2009	466000000
2010	616000000
2011	627000000
2012	651000000
2013	674000000
2014	685000000
2015	514000000
2016	499000000
2017	460000000
2018	436000000
2019	413000000
2020	86000000