| Year | 2011 | 2012 | 2013 | 2014 | 2015 | Total |
| Capacity | 85 | 219 | 312 | 342 | 352 | 1310 |
| Proportion | 6.49% | 16.72% | 23.82% | 26.11% | 26.87% | 100.00% |