Year	current US$
2011	19426.326382752028
2012	19809.822319862447
2013	19721.29216465756
2014	19623.029993395015
2015	19361.813000867798
2016	18944.096149399775
2017	18938.244046970274
2018	19119.12439416876
2019	19220.686695830263
2020	16356.093359441378
2021	17980.088687228752
2022	20492.815311293965