Year	current US$
1995	42000000
1996	44000000
1997	48000000
1998	47000000
1999	51000000
2000	48000000
2001	46000000
2002	46000000
2003	52000000
2004	61000000
2005	57000000
2006	72000000
2007	74000000
2008	76000000
2009	77000000
2010	94000000
2011	106000000
2012	76000000
2013	82000000
2014	216000000
2015	202000000
2016	197000000
2017	161000000
2018	88000000
2019	124000000
2020	32000000