| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.19 | 7.89 | 6.1 |
| 2024 | 8.26 | 12.21 | 6.17 |
| 2023 | 10.84 | 12.95 | 7.88 |
| 2022 | 10.91 | 12.46 | 9.38 |
| 2021 | 0 | -0.25 | |
| 2020 | 0 | -0.29 | |
| 2019 | 19.83 | 87.34 | 2.05 |
| 2018 | 3.88 | 5.65 | 1.98 |
| 2017 | 4.71 | 5.15 | 4.24 |
| 2016 | 4.7 | 5.46 | 4.28 |
| 2015 | 5.12 | 9.81 | 2.73 |
| 2014 | 2.93 | 4.77 | 1.89 |
| 2013 | 1.87 | 2.26 | 1.58 |
| 2012 | 1.6 | 2.1 | 1.33 |
| 2011 | 2.07 | 2.51 | 1.51 |