Year	constant 2010 US$
1990	2740.21853088687
1991	3042.81790628442
1992	3023.15876148486
1993	3044.48106927024
1994	3139.84473076143
1995	3180.78682168821
1996	3301.0688863879
1997	3319.53531785854
1998	3399.49854808998
1999	3345.33501786623
2000	3612.50883071692
2001	3621.71224785884
2002	3806.02684859982
2003	3842.01612820789
2004	4045.76880600476
2005	3974.13129333235
2006	4373.87111961459
2007	4235.81653759752
2008	4567.30851612777
2009	4499.23383150175
2010	4509.12949169196
2011	4747.81199875572
2012	5082.90290733302
2013	5533.50344606618
2014	5845.02384617927
2015	6039.51067328143
2016	5972.32946014639
2017	5938.26160840272