| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 6.19 | 7.97 | 4.22 |
| 2023 | 8.71 | 11.16 | 6.95 |
| 2022 | 10.24 | 12.89 | 8.7 |
| 2021 | 14.85 | 20.24 | 11.22 |
| 2020 | 9.7 | 16.18 | 6.04 |
| 2019 | 6.54 | 8.16 | 5.65 |
| 2018 | 8.55 | 11.68 | 5.66 |
| 2017 | 8.61 | 10.72 | 6.96 |
| 2016 | 7.38 | 8.87 | 6.46 |
| 2015 | 9.74 | 15.91 | 7.02 |
| 2014 | 7.67 | 10.56 | 6.1 |
| 2013 | 5.45 | 8.35 | 3.51 |
| 2012 | 3.63 | 5.08 | 2.7 |
| 2011 | 6.42 | 8.33 | 4.8 |