Year U.S. Dollars 2010-01-01 37634500000 2011-01-01 42717400000 2012-01-01 46984100000 2013-01-01 50326300000 2014-01-01 51180700000 2015-01-01 55377200000 2016-01-01 57810500000 2017-01-01 58056100000 2018-01-01 61286500000 2019-01-01 64849900000 2020-01-01 68494700000 2021-01-01 72393700000 2022-01-01 76479600000 2023-01-01 80787700000