| 序号 | 时间 (年) |
数据 (万人) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 33.28 |
| 8 | 2014 | 32.12 |
| 9 | 2013 | 30.84 |
| 10 | 2012 | 29.71 |
| 11 | 2011 | 29.73 |
| 12 | 2010 | 28.74 |
| 13 | 2009 | 25.74 |
| 14 | 2005 | 23.31 |
| 15 | 2000 | 19.67 |
| 16 | 1978 | 18.57 |
| 17 | 1959 | 11.81 |
