| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.77 | 11.98 | 5.5 |
| 2024 | 4.74 | 7.43 | 2.86 |
| 2023 | 3.4 | 5.48 | 1.32 |
| 2022 | 1.4 | 1.76 | 1.14 |
| 2021 | 1.76 | 2.3 | 1.32 |
| 2020 | 2.84 | 3.52 | 2.01 |
| 2019 | 2.8 | 3.8 | 1.92 |
| 2018 | 3.42 | 4.6 | 1.93 |
| 2017 | 6.99 | 10.56 | 4.48 |
| 2016 | 10.19 | 12.78 | 8 |
| 2015 | 14.08 | 22.2 | 8.87 |
| 2014 | 9.3 | 12.57 | 6.65 |
| 2013 | 6.15 | 7.63 | 5.08 |
| 2012 | 5.6 | 7.22 | 4.16 |
| 2011 | 6.98 | 8.16 | 6.01 |