Year	constant 2015 US$
2014	49288.90913669301
2015	49630.240507687355
2016	53595.68702745353
2017	51104.983446193626
2018	49113.78183485398
2019	48309.540720831355
2020	43734.06170308472
2021	45341.25427637764
2022	47158.395794062446