Year	constant 2010 US$
1991	1597.53303293702
1992	1926.29387033221
1993	2167.64399181841
1994	2388.49510599623
1995	2769.98908491388
1996	2897.8260222238
1997	2387.08480735024
1998	2556.05391694376
1999	2731.50545287211
2000	2906.75961951187
2001	3012.04295741193
2002	3090.27666862435
2003	3236.56056706514
2004	3494.51031449215
2005	3569.54617658155
2006	3719.91117733272
2007	3867.51006511003
2008	4073.04881766621
2009	4264.46307164433
2010	4831.62619904923
2011	4495.284977447
2012	4482.11589758263
2013	5166.6339699638
2014	5431.98431119278
2015	5417.09499231303
2016	5625.97352348045
2017	5798.76730606168
2018	5925.51091029222