Year	current US$
1995	13000000
1996	21000000
1997	53000000
1998	57000000
1999	62000000
2000	66000000
2001	70000000
2002	86000000
2003	135000000
2004	129000000
2005	128000000
2006	168000000
2007	200000000
2008	167000000
2009	137000000
2010	211000000
2011	220000000
2012	225000000
2013	224000000
2014	207000000
2015	208000000
2016	252000000
2017	278000000
2018	360000000
2019	380000000
2020	397000000