| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.95 | 4.43 | 3.32 |
| 2024 | 3.02 | 4.38 | 2.17 |
| 2023 | 4 | 6.24 | 2.79 |
| 2022 | 4.25 | 5.81 | 3.02 |
| 2021 | 4.1 | 5.27 | 2.92 |
| 2020 | 6.65 | 11.72 | 3.9 |
| 2019 | 4.09 | 5.89 | 3.48 |
| 2018 | 4.46 | 6.15 | 3.43 |
| 2017 | 7.03 | 8.61 | 5.89 |
| 2016 | 9.61 | 11.91 | 7.06 |
| 2015 | 11.76 | 23.89 | 6.07 |
| 2014 | 8.38 | 10.22 | 6.16 |
| 2013 | 6.54 | 9.8 | 4.58 |
| 2012 | 5.19 | 6.24 | 3.93 |