| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.91 | 4.01 | 2.4 |
| 2024 | 2.78 | 3.54 | 2.04 |
| 2023 | 4.42 | 6.59 | 3.25 |
| 2022 | 4.2 | 6.63 | 2.67 |
| 2021 | 6.15 | 9.1 | 3.97 |
| 2020 | 10.42 | 13.44 | 6.44 |
| 2019 | 5.16 | 8.99 | 3.08 |
| 2018 | 4.72 | 7.11 | 3.23 |
| 2017 | 8.91 | 11.27 | 6.25 |
| 2016 | 10.44 | 14.43 | 8.1 |
| 2015 | 15.08 | 26.84 | 6.96 |
| 2014 | 7.86 | 20.78 | 4.84 |
| 2013 | 2.48 | 5.41 | 1.68 |
| 2012 | 1.83 | 2 | 1.7 |