Year	current US$
1995	668000000
1996	775000000
1997	808000000
1998	814000000
1999	912000000
2000	839000000
2001	789000000
2002	689000000
2003	696000000
2004	813000000
2005	998000000
2006	1152000000
2007	1136000000
2008	1356000000
2009	1029000000
2010	636000000
2011	589000000
2012	581000000
2013	362000000
2014	398000000
2015	995000000
2016	969000000
2017	1131000000
2018	1276000000
2019	1274000000
2020	453000000