Year	constant 2010 US$
1996	1061.76216871419
1997	839.566950750491
1998	1021.58145116923
1999	1406.06898556592
2000	1532.17986764761
2001	1743.20785032428
2002	1867.73430540586
2003	2131.34916587251
2004	2357.07094848888
2005	2492.95354231614
2006	2788.74632809686
2007	3022.77333980601
2008	3292.49024201603
2009	3412.33231435743
2010	3530.69065641895
2011	3631.24156570504
2012	3631.33111545539
2013	3759.44857324929
2014	3807.50384681159
2015	3964.77818214135
2016	4119.91467083978
2017	4228.58550577526