| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.21 | 2.73 | 1.86 |
| 2024 | 1.54 | 3.6 | 1.04 |
| 2023 | 1.5 | 1.76 | 1.33 |
| 2022 | 1.55 | 2.39 | 1.09 |
| 2021 | 4.69 | 9.65 | 1.75 |
| 2020 | 4.61 | 7.93 | 2.81 |
| 2019 | 3.76 | 5.32 | 2.94 |
| 2018 | 3.63 | 5.55 | 2.48 |
| 2017 | 9.4 | 14.9 | 5.17 |
| 2016 | 7.75 | 11.01 | 4.18 |
| 2015 | 8.36 | 13.71 | 4.43 |
| 2014 | 6.92 | 9.83 | 5.32 |
| 2013 | 8.14 | 12.03 | 5.89 |
| 2012 | 11.38 | 15.65 | 9.02 |
| 2011 | 19.78 | 25.48 | 14.39 |