| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.57 | 3.03 | 2.23 |
| 2024 | 1.57 | 3.26 | 0.72 |
| 2023 | 1.63 | 3.18 | 0.91 |
| 2022 | 4.32 | 7.09 | 2.58 |
| 2021 | 7.87 | 12.3 | 4.79 |
| 2020 | 7.27 | 11.93 | 3.53 |
| 2019 | 3.58 | 4.6 | 2.96 |
| 2018 | 4.54 | 6.01 | 3.03 |
| 2017 | 6.47 | 9.04 | 4.2 |
| 2016 | 9.14 | 15.35 | 5.39 |
| 2015 | 6.42 | 10.65 | 3.71 |
| 2014 | 4.43 | 6.08 | 2.89 |
| 2013 | 2.7 | 3.61 | 1.93 |
| 2012 | 2.17 | 2.79 | 1.67 |
| 2011 | 2.96 | 4.12 | 2.21 |