| 序号 | 时间 (年) |
数据 (万人) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 29.38 |
| 8 | 2014 | 27.68 |
| 9 | 2013 | 25.66 |
| 10 | 2012 | 24.12 |
| 11 | 2011 | 22.68 |
| 12 | 2010 | 21.47 |
| 13 | 2009 | 20.32 |
| 14 | 2008 | 19.21 |
| 15 | 2007 | 18.30 |
