| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.13 | 3.61 | 2.7 |
| 2024 | 2.47 | 4.19 | 1.72 |
| 2023 | 3.35 | 3.94 | 2.41 |
| 2022 | 3.37 | 5.12 | 2.65 |
| 2021 | 4.73 | 6.45 | 3.83 |
| 2020 | 6.14 | 8.73 | 4.12 |
| 2019 | 7.53 | 13.18 | 4.92 |
| 2018 | 21.98 | 32.09 | 9.99 |
| 2017 | 29.76 | 32.52 | 21.2 |
| 2016 | 24.74 | 32.52 | 14.53 |
| 2015 | 21.47 | 39.72 | 7.8 |
| 2014 | 9.29 | 12.28 | 7.75 |
| 2013 | 6.31 | 13.56 | 4.8 |
| 2012 | 8 | 11.53 | 4.86 |
| 2011 | 12.92 | 18.95 | 8.89 |