Year U.S. Dollars 2010-01-01 8758600000 2011-01-01 9774300000 2012-01-01 10532000000 2013-01-01 10983000000 2014-01-01 11880400000 2015-01-01 12747700000 2016-01-01 13230100000 2017-01-01 13726900000 2018-01-01 14532500000 2019-01-01 15498700000 2020-01-01 16518400000 2021-01-01 17599700000 2022-01-01 18773500000 2023-01-01 20025600000