Year	current US$
1995	31000000
1996	38000000
1997	40000000
1998	42000000
1999	45000000
2000	46000000
2001	45000000
2002	46000000
2003	46000000
2004	56000000
2005	70000000
2006	78000000
2007	122000000
2008	167000000
2009	174000000
2010	205000000
2011	184000000
2012	164000000
2013	204000000
2014	208000000
2015	253000000
2016	284000000
2017	308000000
2018	338000000
2019	349000000
2020	92000000