| 年份 | 分类 | 数值 |
| 2007 | United States : coal billion Btu | 21,280,260.00 |
| 2008 | United States : coal billion Btu | 19,437,970.00 |
| 2009 | United States : coal billion Btu | 19,289,660.00 |
| 2010 | United States : coal billion Btu | 18,675,840.00 |
| 2011 | United States : coal billion Btu | 16,265,580.00 |
| 2012 | United States : coal billion Btu | 15,906,810.00 |
| 2013 | United States : coal billion Btu | 16,594,720.00 |
| 2014 | United States : coal billion Btu | 15,086,210.00 |