Year	constant 2010 US$
1991	852.198564309664
1992	890.31176237866
1993	934.206940779079
1994	985.366239154515
1995	1052.25170634498
1996	1113.73256891326
1997	1148.21496194245
1998	1152.45230008598
1999	1174.28521773098
2000	1168.72579549092
2001	1204.85063250369
2002	1234.43418624719
2003	1287.34944392983
2004	1401.26162807369
2005	1509.61929223763
2006	1634.48714745235
2007	1741.86973743715
2008	1858.03145955348
2009	1967.79930642421
2010	2087.86056792756
2011	2246.04882714937
2012	2389.38153457305
2013	2597.7824108013
2014	2822.9120562361
2015	2998.21845765967
2016	3176.71516404542
2017	3376.35610692001
2018	3510.25315863437