Year	constant 2010 US$
1991	951.588893306473
1992	988.240972248714
1993	1038.02338688789
1994	1250.16667785104
1995	1311.10302054215
1996	1395.82029176876
1997	1432.31044911424
1998	1429.29052897357
1999	1455.50105110713
2000	1453.33429869813
2001	1478.17582920479
2002	1518.04663504876
2003	1547.04966973421
2004	1664.72656638272
2005	1784.08226658699
2006	1918.59276890993
2007	2029.8424745239
2008	2172.44645152042
2009	2286.66649547173
2010	2397.76460266918
2011	2572.81065338328
2012	2724.36145114089
2013	2948.47329246442
2014	3187.64861716033
2015	3364.03311198369
2016	3529.40056759314
2017	3741.01608537184
2018	3674.324240278