Year	current US$
1995	69000000
1996	86000000
1997	68000000
1998	69000000
1999	71000000
2000	59000000
2001	82000000
2002	85000000
2003	118000000
2004	176000000
2007	157000000
2008	217000000
2009	549000000
2010	312000000
2011	327000000
2012	308000000
2013	360000000
2014	435000000
2015	557000000
2016	457000000