| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 10.8 | 14.99 | 8.79 |
| 2025 | 9.18 | 11.09 | 8.06 |
| 2024 | 1.45 | 1.88 | 0.81 |
| 2023 | 1.2 | 2.03 | 0.5 |
| 2022 | 0.62 | 0.73 | 0.49 |
| 2021 | 0.79 | 0.98 | 0.62 |
| 2020 | 1.13 | 1.49 | 0.9 |
| 2019 | 1.37 | 1.96 | 1.05 |
| 2018 | 3.58 | 5.66 | 1.54 |
| 2017 | 5.57 | 7.78 | 4.51 |
| 2016 | 4.56 | 6.72 | 2.93 |
| 2015 | 5.62 | 6.88 | 3.23 |
| 2014 | 3.99 | 6.89 | 3.04 |
| 2013 | 8.1 | 10.77 | 6.07 |
| 2012 | 7.88 | 10.08 | 5.94 |
| 2011 | 10.77 | 16.75 | 7.29 |
| 2010 | 12.43 | 17.87 | 6.6 |