Year	constant 2010 US$
1990	480.450782617549
1991	528.075704436717
1992	497.898116341035
1993	501.977742510126
1994	501.36956814152
1995	489.45732572987
1996	510.314291770802
1997	520.316598655848
1998	546.114860701885
1999	564.944058063249
2000	550.586512427916
2001	593.829485675421
2002	586.036886171054
2003	637.712824363718
2004	627.771441424165
2005	648.032399232566
2006	652.471424353797
2007	660.156690285045
2008	671.939190175805
2009	679.581020580641
2010	681.740781212314
2011	684.465459799555
2012	655.267716106011
2013	658.934381186438
2014	685.222449609439
2015	706.032580319065
2016	719.715532125261
2017	742.193302025394
2018	742.785497021297