Year	current US$
1995	241000000
1996	279000000
1997	310000000
1998	310000000
1999	310000000
2000	348000000
2001	342000000
2002	338000000
2003	404000000
2004	469000000
2005	528000000
2006	541000000
2007	538000000
2008	460000000
2009	386000000
2010	369000000
2011	347000000
2012	384000000
2013	362000000
2014	328000000
2015	347000000
2016	440000000
2017	554000000
2018	519000000
2019	514000000
2020	166000000