Year	constant 2010 US$
1991	8856.0520544192
1992	8588.04705858069
1993	8548.31315166266
1994	8812.29944926503
1995	8956.02079163332
1996	8972.68779744587
1997	9291.08913577449
1998	9707.20593020268
1999	10044.9777266139
2000	10495.0159032343
2001	10923.1046996323
2002	11450.2838364102
2003	11925.0702074427
2004	12549.66935929
2005	13126.4556553927
2006	13653.2219400698
2007	13732.1493782744
2008	13873.3246635431
2009	12977.6353219238
2010	13092.2337567695
2011	13347.0247958271
2012	13197.2609183053
2013	13510.7174545978
2014	14119.4821909086
2015	14653.6201059971
2016	15032.1355766305
2017	15695.6979442978
2018	16503.4721885516