| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.79 | 7.54 | 5.74 |
| 2025 | 6.7 | 9.69 | 4.5 |
| 2024 | 3.39 | 6.79 | 2.32 |
| 2023 | 4.36 | 5.11 | 3.01 |
| 2022 | 3.68 | 4.79 | 2.66 |
| 2021 | 3.68 | 6.46 | 1.29 |
| 2020 | 2.13 | 2.63 | 1.88 |
| 2019 | 2.33 | 3.71 | 1.7 |
| 2018 | 4.86 | 10.49 | 1.71 |
| 2017 | 9.39 | 11.13 | 8.65 |
| 2016 | 8.74 | 11.4 | 6.52 |
| 2015 | 9.36 | 15.47 | 3.57 |
| 2014 | 1.99 | 4.16 | 1.61 |
| 2013 | 1.49 | 1.83 | 1.21 |
| 2012 | 3.1 | 7.67 | 1.18 |
| 2011 | 8.9 | 10.86 | 6.13 |