Year	constant 2010 US$
1991	2138.51596966332
1992	2306.95596604569
1993	2196.44295671112
1994	2124.14578026843
1995	2168.18820603033
1996	2118.32588477589
1997	2210.25059552602
1998	2241.63131807917
1999	2345.12301426375
2000	2294.72764209161
2001	2433.06464019424
2002	2450.51369881727
2003	2451.1445687555
2004	2493.41158770535
2005	2613.15205112088
2006	2707.18992305163
2007	2837.76393417889
2008	2819.07051196549
2009	2750.38020514244
2010	2904.91691493349
2011	3042.96641972327
2012	2925.57787711317
2013	3052.84385845787
2014	3074.27569432526
2015	2788.9706626185
2016	3123.01419028266
2017	3153.57870984358
2018	3165.23552302803