| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.1 | 9.13 | 4.27 |
| 2024 | 4.39 | 5.65 | 3.47 |
| 2023 | 6.4 | 11.28 | 4.61 |
| 2022 | 7.16 | 13.66 | 4.73 |
| 2021 | 14.55 | 19.45 | 10.2 |
| 2020 | 20.55 | 29.8 | 14.52 |
| 2019 | 15.12 | 18.37 | 11.15 |
| 2018 | 15.45 | 20.58 | 10.15 |
| 2017 | 13.65 | 18.34 | 10.05 |
| 2016 | 23.11 | 32.11 | 17.92 |
| 2015 | 52.19 | 99.14 | 23.99 |
| 2014 | 28.72 | 43.56 | 21.78 |
| 2013 | 16.59 | 25.96 | 10.1 |
| 2012 | 10.74 | 12.52 | 9.17 |