| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.63 | 8.14 | 5.5 |
| 2024 | 4.03 | 7.85 | 2.52 |
| 2023 | 7.08 | 18.24 | 3.93 |
| 2022 | 7.94 | 11.11 | 5.81 |
| 2021 | 9.41 | 12.84 | 5.58 |
| 2020 | 8.63 | 12.7 | 4.08 |
| 2019 | 4.04 | 5.56 | 2.6 |
| 2018 | 6.53 | 9.99 | 3.26 |
| 2017 | 7.24 | 10.15 | 5.43 |
| 2016 | 13.18 | 19.3 | 10.01 |
| 2015 | 23.93 | 46.4 | 11.51 |
| 2014 | 8.26 | 16.97 | 5.16 |
| 2013 | 5.46 | 7.96 | 3.09 |
| 2012 | 2.68 | 3.16 | 2.1 |