Year	constant 2015 US$
2006	3299.9374329786656
2007	3181.090713084954
2008	3078.314801085513
2009	2944.169951226918
2010	2935.016793459887
2011	3151.9127528315967
2012	3494.964653284579
2013	3970.193377951489
2014	3919.917139679331
2015	3808.560601457578
2016	3997.898487642827
2017	4227.817064566168
2018	4194.333501861171
2019	4339.3066870381535
2020	4365.802560866092
2021	4674.523550303643
2022	4741.108116205183