Year	constant 2015 US$
2006	7745.193999196798
2007	8219.484382105118
2008	8458.170113271446
2009	7764.922722086329
2010	7850.20611691099
2011	8019.473312595258
2012	8262.92382032172
2013	8442.803046815203
2014	8469.763428557837
2015	8645.609617432247
2016	8867.013326346407
2017	9215.36896314674
2018	9265.259580973043
2019	9535.3276588921
2020	8586.484933455342
2021	8939.454958800203