Year	current US$
1995	110000000
1996	114000000
1997	120000000
1998	126000000
1999	132000000
2000	141000000
2001	149000000
2002	146000000
2003	153000000
2004	163000000
2005	158000000
2006	166000000
2007	177000000
2008	154000000
2009	128000000
2010	145000000
2011	114000000
2012	100000000
2013	102000000
2014	115000000
2015	119000000
2016	99000000