Year U.S. Dollars 2010-01-01 2839000000 2011-01-01 3016900000 2012-01-01 3166800000 2013-01-01 3270800000 2014-01-01 3445200000 2015-01-01 3577900000 2016-01-01 3657300000 2017-01-01 3740300000 2018-01-01 3861500000 2019-01-01 4008300000 2020-01-01 4146000000 2021-01-01 4279600000 2022-01-01 4424000000 2023-01-01 4556700000