| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.5 | 17.21 | 11.82 |
| 2024 | 10.17 | 17.42 | 5.12 |
| 2023 | 8.29 | 10.14 | 6.63 |
| 2022 | 8.05 | 13.42 | 5.91 |
| 2021 | 9.42 | 16.11 | 5.23 |
| 2020 | 7.46 | 9.85 | 5.47 |
| 2019 | 5.48 | 8.77 | 3.43 |
| 2018 | 3.78 | 4.9 | 2.88 |
| 2017 | 5.52 | 6.98 | 4 |
| 2016 | 11.69 | 20.4 | 6.77 |
| 2015 | 22.66 | 38.88 | 12.3 |
| 2014 | 18.98 | 23.23 | 15.67 |
| 2013 | 14.43 | 21.67 | 10.36 |
| 2012 | 12.8 | 16.19 | 9.22 |
| 2011 | 13.59 | 18.61 | 10.56 |