Year	constant 2010 US$
1991	3587.21588480544
1992	3702.82181581813
1993	3777.22545769118
1994	3783.76366403653
1995	3917.93318298643
1996	3918.22214648433
1997	3884.05057976699
1998	3827.81908299234
1999	3844.31905515984
2000	3825.23789117124
2001	3811.51322040428
2002	3850.58629833013
2003	3874.44288615735
2004	3987.13587932605
2005	4245.96365966394
2006	4502.6572295935
2007	4669.55614549807
2008	4784.29574680894
2009	4601.17202139036
2010	4651.33262881036
2011	4770.57142124916
2012	4852.85140415737
2013	4987.6046683833
2014	5020.47698640271
2015	5089.77189604206
2016	5372.13651010066
2017	5521.32656515755
2018	5669.70476314872