| Items | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 |
| State-level | 0 | 0 | 4651 | 6790 | 9550 | 9128 |
| Province-level | 300 | 800 | 800 | 800 | 800 | 800 |
| City-level | 1500 | 4200 | 4200 | 4200 | 4200 | 4200 |
| County-level | 0 | 0 | 3000 | 3500 | 4000 | 4000 |
| Overall situation | 1800 | 5000 | 12,651 | 15,290 | 18,550 | 18,128 |