Year U.S. Dollars 2010-01-01 11993000000 2011-01-01 14451900000 2012-01-01 16433700000 2013-01-01 16980700000 2014-01-01 17294400000 2015-01-01 16490500000 2016-01-01 20420200000 2017-01-01 25061800000 2018-01-01 28936700000 2019-01-01 32683200000 2020-01-01 36114200000 2021-01-01 39171200000 2022-01-01 42341900000 2023-01-01 45580900000