| 年份 | 分类 | 数值 |
| 2007 | United States : coal thousand tons | 161,588.60 |
| 2008 | United States : coal thousand tons | 189,466.80 |
| 2009 | United States : coal thousand tons | 174,917.30 |
| 2010 | United States : coal thousand tons | NA |
| 2011 | United States : coal thousand tons | NA |
| 2012 | United States : coal thousand tons | NA |
| 2013 | United States : coal thousand tons | NA |
| 2014 | United States : coal thousand tons | NA |