Year	constant 2015 US$
2015	3895.57380684974
2016	4069.6717704606867
2017	4318.12340331438
2018	4381.354486126874
2019	4334.668983683294
2020	4114.490876432178
2021	4263.815962233117
2022	3933.512373373384
2023	3843.661911203181