Year	constant 2010 US$
1988	325160319.390448
1989	357768104.619616
1990	358978853.064719
1991	323366565.743666
1992	243784139.90644
1993	297980779.274071
1994	197646480.370428
1995	267155181.418132
1996	340088948.894274
1997	388644302.379772
1998	479106350.989682
1999	558084353.339537
2000	593342390.102864
2001	580448022.372276
2002	568359552.624849
2003	609057400.774519
2004	668492377.032701
2005	668693851.528492
2006	716846256.022409
2007	695892908.460201
2008	790585921.481712
2009	966473156.306772
2010	1016035882.27122
2011	1222748714.95222
2012	1248335975.91761
2013	1310591595.11685
2014	1370026571.37503
2015	1419992246.33107
2016	1429461547.63322
2017	1412134740.99524
2018	1440139695.91011