Table 1 Exploitation quantity of coal from 2007 to 2014
Year | Exploitation quantity (tons) | Year | Exploitation quantity (tons) |
|---|---|---|---|
2007 | 9.41 × 106 | 2011 | 1.50 × 107 |
2008 | 1.383 × 107 | 2012 | 1.53 × 107 |
2009 | 1.42 × 107 | 2013 | 1.55 × 107 |
2010 | 1.453 × 107 | 2014 | 1.23 × 107 |