Year	constant 2010 US$
1990	1101.86112657978
1991	1032.6251846112
1992	973.924512673441
1993	924.148659433462
1994	795.852128840371
1995	705.368397596962
1996	745.469749574296
1997	830.02355349501
1998	944.461969847159
1999	1034.70739751171
2000	1119.93467569527
2001	1320.51063164041
2002	1475.66174033714
2003	1592.90777486191
2004	1754.58218801345
2005	2025.27280450578
2006	2296.5893994374
2007	2615.59672180051
2008	3053.28505937646
2009	3060.10638568854
2010	3355.0615839966
2011	3435.43644835392
2012	3806.06574386362
2013	4210.81659878238
2014	4387.15350213471
2015	4278.55775621266
2016	4136.90198733687
2017	4332.06239739392
2018	4692.72208324284