| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.26 | 12.76 | 4.54 |
| 2024 | 7.78 | 9.63 | 5.17 |
| 2023 | 5.32 | 8.21 | 3.49 |
| 2022 | 2.82 | 4.25 | 2.03 |
| 2021 | 2.15 | 3.75 | 1.35 |
| 2020 | 1.86 | 2.45 | 1.32 |
| 2019 | 1.69 | 2.3 | 1.4 |
| 2018 | 2.16 | 2.51 | 1.48 |
| 2017 | 3.07 | 4.05 | 2.35 |
| 2016 | 4.47 | 5.66 | 3.67 |
| 2015 | 9.71 | 22.49 | 4.02 |
| 2014 | 5.65 | 7.78 | 4.16 |
| 2013 | 2.3 | 4.19 | 1.57 |
| 2012 | 2.14 | 2.62 | 1.71 |
| 2011 | 2.97 | 4.23 | 1.87 |
| 2010 | 7.11 | 18.64 | 3.28 |