| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.02 | 7.16 | 4.99 |
| 2024 | 5.38 | 8.45 | 3.69 |
| 2023 | 8.31 | 12.74 | 5.85 |
| 2022 | 9.34 | 12.45 | 5.83 |
| 2021 | 11.08 | 18.07 | 8.1 |
| 2020 | 7.94 | 11.21 | 5.56 |
| 2019 | 6.08 | 8.32 | 4.96 |
| 2018 | 8.14 | 12.28 | 5.57 |
| 2017 | 10.02 | 13.02 | 7.8 |
| 2016 | 15.06 | 19.48 | 11.96 |
| 2015 | 15.92 | 25.53 | 8.14 |
| 2014 | 9 | 11.28 | 6.45 |
| 2013 | 5.97 | 8.06 | 4.58 |
| 2012 | 5 | 5.87 | 3.75 |
| 2011 | 6.74 | 8.82 | 5.41 |