Year	current US$
1980	178000000
1981	169000000
1982	150000000
1983	170000000
1984	159000000
1985	179000000
1986	249000000
1987	345000000
1988	348000000
1989	346000000
1990	418000000
1991	435000000
1992	439000000
1993	327000000
1994	326000000
1995	362000000
1996	416000000
1997	388000000
1998	437000000
1999	468000000
2000	474000000
2001	514000000
2002	536000000
2003	594000000
2004	616000000
2005	599000000
2006	651000000
2007	746230000
2008	852091000
2009	761744000
2010	838963000
2011	1007684000
2012	951985000
2013	1087447000
2014	1134581833.62147
2015	1022985112.60634
2016	1191679731.68217
2017	1305756809.93165