Year	current US$
1995	159000000
1996	179000000
1997	173000000
1998	185000000
1999	187000000
2000	182000000
2001	198000000
2002	204000000
2003	216000000
2004	255000000
2005	275000000
2006	327000000
2007	357000000
2008	452000000
2009	354000000
2010	398000000
2011	400000000
2012	366000000
2013	438000000
2014	481000000
2015	547000000
2016	616000000
2017	669000000
2018	588000000
2019	578000000
2020	205000000