Year	constant 2010 US$
1996	1006.08055833654
1997	829.882945027134
1998	993.631388746469
1999	1220.8772239083
2000	1336.38289812387
2001	1426.90459565093
2002	1567.47686816767
2003	1796.92360831611
2004	1888.46804935675
2005	2037.5380142228
2006	2238.7698513015
2007	2603.90836529483
2008	2987.19286252847
2009	3128.24100286745
2010	3198.07205847267
2011	3264.47703804185
2012	3274.66183349324
2013	3341.22995183837
2014	3442.23662709817
2015	3457.12156631201
2016	3531.61822500277
2017	3617.55003178751
2018	3736.79598976919