| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.53 | 3.62 | 1.96 |
| 2024 | 2 | 2.57 | 1.53 |
| 2023 | 2.54 | 2.8 | 2.2 |
| 2022 | 2.79 | 3.81 | 2.28 |
| 2021 | 3.85 | 4.79 | 3.2 |
| 2020 | 4.72 | 5.61 | 3.95 |
| 2019 | 5.1 | 7.03 | 4.19 |
| 2018 | 9.67 | 17.13 | 4.24 |
| 2017 | 25.37 | 37.21 | 12.56 |
| 2016 | 31.5 | 45.57 | 18.92 |
| 2015 | 34.26 | 78.29 | 13.3 |
| 2014 | 8.64 | 17.18 | 4.95 |
| 2013 | 6.03 | 7.18 | 4.81 |
| 2012 | 6.24 | 7.75 | 5.16 |
| 2011 | 8.18 | 9.97 | 6.19 |