| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.93 | 4.7 | 3.21 |
| 2024 | 3.88 | 6.24 | 2.8 |
| 2023 | 5.44 | 6.27 | 4.73 |
| 2022 | 4.75 | 8.03 | 2.6 |
| 2021 | 3.49 | 4.74 | 2.95 |
| 2020 | 4.1 | 5.2 | 3.42 |
| 2019 | 5.7 | 9.2 | 4.43 |
| 2018 | 4.38 | 6.79 | 2.88 |
| 2017 | 10.09 | 14.67 | 5.8 |
| 2016 | 13.46 | 17.26 | 7.32 |
| 2015 | 11.45 | 18.86 | 6.15 |
| 2014 | 3.96 | 7.73 | 2.84 |
| 2013 | 3.69 | 4.27 | 3.23 |
| 2012 | 4 | 4.92 | 3.01 |
| 2011 | 5.24 | 6.8 | 3.39 |