| 序号 | 时间 (年) |
数据 (‰) |
|---|---|---|
| 1 | 2022 | |
| 2 | 2021 | |
| 3 | 2020 | |
| 4 | 2019 | |
| 5 | 2018 | |
| 6 | 2017 | |
| 7 | 2016 | |
| 8 | 2015 | |
| 9 | 2014 | |
| 10 | 2013 | |
| 11 | 2012 | 6.49 |
| 12 | 2011 | 5.46 |
| 13 | 2010 | 6.10 |
| 14 | 2009 | 5.51 |
| 15 | 2005 | 4.48 |
| 16 | 2000 | 3.74 |
| 17 | 1995 | 3.99 |
| 18 | 1990 | 12.90 |
| 19 | 1985 | 6.73 |
| 20 | 1980 | 8.38 |
| 21 | 1978 | 10.37 |
