Year	constant 2010 US$
1991	583.175670027296
1992	567.520531927186
1993	589.389175712414
1994	560.010059458875
1995	582.551693587228
1996	620.283492167233
1997	629.226080494448
1998	622.16521725022
1999	627.973379805
2000	613.714693580524
2001	620.098442031765
2002	620.795215716629
2003	612.563932745218
2004	604.768349899035
2005	616.882190717836
2006	657.329056337642
2007	687.515851143049
2008	735.479701220646
2009	749.814047637866
2010	769.298903393123
2011	780.501211246366
2012	821.918117924336
2013	825.800051375324
2014	839.643540127276
2015	850.075923671668
2016	855.335436064062
2017	872.121314330503
2018	906.559300043192