| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.95 | 3.5 | 2.45 |
| 2024 | 2.64 | 4.16 | 1.89 |
| 2023 | 2.62 | 3.63 | 2.11 |
| 2022 | 2.06 | 3.29 | 1.21 |
| 2021 | 1.62 | 2.11 | 1.28 |
| 2020 | 2.75 | 3.59 | 1.57 |
| 2019 | 2.09 | 3.13 | 1.16 |
| 2018 | 3.55 | 5.77 | 1.77 |
| 2017 | 5.56 | 6.54 | 4.64 |
| 2016 | 13.25 | 26.19 | 5.12 |
| 2015 | 13.13 | 23.93 | 8.33 |
| 2014 | 10.09 | 12.46 | 7.8 |
| 2013 | 9.42 | 13.19 | 7.67 |
| 2012 | 9.16 | 13.33 | 6.41 |
| 2011 | 12.33 | 15.95 | 9.92 |