Year	current US$
1995	77000000
1996	108000000
1997	193000000
1998	201000000
1999	210000000
2000	213000000
2001	201000000
2002	242000000
2003	249000000
2004	341000000
2005	453000000
2006	382000000
2007	463000000
2008	397000000
2009	367000000
2010	450000000
2011	472000000
2012	413000000
2013	430000000
2014	447000000
2015	531000000
2016	464000000
2017	453000000
2018	429000000
2019	436000000
2020	143000000