WHO | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | Mean |
Beijing | 9% | 10% | 10% | 16% | 15% | 10% | 13% | 20% | 13% |
Shanghai |
|
|
|
| 21% | 17% | 17% | 18% | 18% |
Chengdu |
|
|
|
| 2% | 2% | 1% | 4% | 3% |
Guangzhou |
|
|
| 6% | 20% | 16% | 20% | 35% | 22% |
Shenyang |
|
|
|
|
| 13% | 5% | 10% | 9% |