| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.67 | 4.88 | 3.06 |
| 2024 | 3.36 | 4.76 | 2.36 |
| 2023 | 5.28 | 8.4 | 4.02 |
| 2022 | 3.87 | 5.91 | 2.67 |
| 2021 | 7.53 | 9.99 | 4.61 |
| 2020 | 11.41 | 14.53 | 9.51 |
| 2019 | 11.47 | 14.9 | 7.35 |
| 2018 | 11.33 | 21.35 | 6.99 |
| 2017 | 11.93 | 14.02 | 10.02 |
| 2016 | 28.22 | 49.97 | 13.15 |
| 2015 | 40.76 | 73.59 | 12.45 |
| 2014 | 18.34 | 29.8 | 10.96 |
| 2013 | 6.59 | 13.99 | 2.54 |
| 2012 | 3.27 | 4.03 | 2.47 |