| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 3.41 | 6.18 | 1.15 |
| 2023 | 4.85 | 6.7 | 3.76 |
| 2022 | 3.98 | 6.02 | 1.97 |
| 2021 | 2.46 | 4.3 | 1.26 |
| 2020 | 2.06 | 3.36 | 1.56 |
| 2019 | 2.75 | 4.85 | 1.58 |
| 2018 | 5.63 | 7.67 | 3.79 |
| 2017 | 6.3 | 8.76 | 4.72 |
| 2016 | 6.38 | 8.83 | 4.15 |
| 2015 | 4.86 | 9.07 | 2.88 |
| 2014 | 5.19 | 6.07 | 3.77 |
| 2013 | 4.58 | 5.99 | 2.46 |
| 2012 | 2.73 | 3.61 | 1.98 |
| 2011 | 4.74 | 6.62 | 2.87 |