Year	current US$
2011	50896912885.7158
2012	58623848241.1957
2013	61325446003.1774
2014	62842274545.4357
2015	36651997223.2357
2016	31362269362.8302
2017	37345690739.8795
2018	45872745489.1882
2019	36683876955.7856
2020	25433300108.1684
2021	45182286030.9546