Year	constant 2010 US$
1991	4761.84208731548
1992	4964.41369183885
1993	5123.91212034932
1994	5018.97023206545
1995	4862.14535248117
1996	4788.12942689437
1997	4874.68503594744
1998	4870.30634332814
1999	4718.33134913679
2000	4774.33709828571
2001	4812.63638888429
2002	4519.16436472693
2003	4448.27126743156
2004	4260.60688073255
2005	4591.90777073146
2006	4555.84549400719
2007	4677.29022480314
2008	4173.34013478636
2009	3818.35231158451
2010	3526.03955627216
2011	3443.44695068385
2012	3457.21269768595
2013	3472.24680853713
2014	3667.76744210275
2015	3846.91112791938
2016	4146.43819513524
2017	4530.33019270924