Year U.S. Dollars 2015-01-01 -57776600000 2016-01-01 -38667300000 2017-01-01 -32269600000 2018-01-01 -28305500000 2019-01-01 -36626700000 2020-01-01 -41963100000 2021-01-01 -44412800000 2022-01-01 -43906100000 2023-01-01 -45215700000