| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.71 | 5.85 | 3.57 |
| 2024 | 2.54 | 6.59 | 1.36 |
| 2023 | 2.16 | 2.6 | 1.73 |
| 2022 | 1.69 | 2.5 | 1.11 |
| 2021 | 2.09 | 3.3 | 1.42 |
| 2020 | 1.91 | 2.38 | 1.62 |
| 2019 | 2.3 | 4.14 | 1.7 |
| 2018 | 2.68 | 3.29 | 1.98 |
| 2017 | 3.41 | 4.18 | 2.79 |
| 2016 | 6.13 | 12.98 | 3.61 |
| 2015 | 12.54 | 23.43 | 7 |
| 2014 | 7.96 | 12.29 | 5.68 |
| 2013 | 3.08 | 6.2 | 2.2 |
| 2012 | 2.73 | 3.52 | 1.89 |
| 2011 | 4.18 | 4.83 | 2.95 |