Year	current US$
1995	42000000
1996	50000000
1997	53000000
1998	61000000
1999	72000000
2000	78000000
2001	77000000
2002	72000000
2003	57000000
2004	56000000
2005	59000000
2006	70000000
2007	97000000
2008	94000000
2009	65000000
2010	85000000
2011	92000000
2012	95000000
2013	102000000
2014	99000000
2015	96000000
2016	112000000
2017	116000000
2018	150000000
2019	156000000
2020	67000000