Year	U.S. Dollars
2015-01-01	7265700000
2016-01-01	-953900000
2017-01-01	-1208800000
2018-01-01	-1795200000
2019-01-01	-2005500000
2020-01-01	-3130200000
2021-01-01	-4478000000
2022-01-01	-5509900000
2023-01-01	-6053800000