Year U.S. Dollars 2010-01-01 13191700000 2011-01-01 14408400000 2012-01-01 14758600000 2013-01-01 14201600000 2014-01-01 13863500000 2015-01-01 14143500000 2016-01-01 14002100000 2017-01-01 14358800000 2018-01-01 15255900000 2019-01-01 15844500000 2020-01-01 16597600000 2021-01-01 17384800000 2022-01-01 18222900000 2023-01-01 19134000000