| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.05 | 2.41 | 1.62 |
| 2023 | 3.07 | 3.84 | 2.29 |
| 2022 | 3.38 | 4.54 | 2.74 |
| 2021 | 5.91 | 9.61 | 3.8 |
| 2020 | 5.04 | 6.66 | 3.38 |
| 2019 | 4.88 | 6.2 | 3.09 |
| 2018 | 4.96 | 5.62 | 4.21 |
| 2017 | 3.9 | 4.56 | 3.25 |
| 2016 | 4.46 | 5.95 | 3.74 |
| 2015 | 7.31 | 14.21 | 4.34 |
| 2014 | 9.03 | 11.65 | 6.81 |
| 2013 | 9.03 | 11.8 | 6.59 |
| 2012 | 6.76 | 8.88 | 4.43 |
| 2011 | 4.8 | 5.68 | 3.55 |