| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 15.25 | 16.81 | 12.93 |
| 2025 | 12.89 | 17.95 | 7.76 |
| 2024 | 5.78 | 13.45 | 3.35 |
| 2023 | 4.9 | 7.64 | 2.33 |
| 2022 | 2.91 | 3.42 | 2.13 |
| 2021 | 2.67 | 3.51 | 2.15 |
| 2020 | 2.92 | 4.12 | 2 |
| 2019 | 11.15 | 18.78 | 3.63 |
| 2018 | 10.62 | 13.51 | 7.5 |
| 2017 | 17.6 | 26.34 | 13.26 |
| 2016 | 17.22 | 26.82 | 13.87 |
| 2015 | 16.87 | 32.2 | 7.36 |
| 2014 | 6.17 | 10.86 | 4.12 |
| 2013 | 7.62 | 11.61 | 4.7 |
| 2012 | 8.41 | 12.31 | 5.7 |
| 2011 | 15.13 | 21.95 | 10.6 |
| 2010 | 18.2 | 22.84 | 10.68 |