Year	constant 2010 US$
2006	3586.62923293133
2007	3845.04303037868
2008	4053.43969910962
2009	3893.43909102791
2010	3928.8223269485
2011	3968.89525132824
2012	4005.02218098572
2013	4077.62387087368
2014	4228.8840594665
2015	4370.71890059482
2016	4526.89567684625
2017	4645.33932099053
2018	4750.48848802601