| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.55 | 3.93 | 2.04 |
| 2024 | 7.23 | 18.06 | 3.13 |
| 2023 | 11.43 | 19.46 | 4.63 |
| 2022 | 4.59 | 7.62 | 2.8 |
| 2021 | 4.88 | 6.66 | 3.14 |
| 2020 | 8.21 | 14.1 | 6.13 |
| 2019 | 9.61 | 13.8 | 4.48 |
| 2018 | 5.5 | 8.11 | 3.5 |
| 2017 | 8.88 | 12.57 | 6.79 |
| 2016 | 12.74 | 18.03 | 10.26 |
| 2015 | 13.64 | 30.14 | 8.56 |
| 2014 | 8.91 | 12.81 | 5.78 |
| 2013 | 6.17 | 8.75 | 4.65 |
| 2012 | 5.84 | 7.93 | 4.37 |
| 2011 | 6.45 | 9.75 | 4.19 |
| 2010 | 10.05 | 12.93 | 7.44 |
| 2009 | 9.26 | 12.43 | 6.57 |