| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.34 | 1.86 | 1.17 |
| 2024 | 1.61 | 2.73 | 0.96 |
| 2023 | 3.14 | 4.07 | 2.56 |
| 2022 | 3.37 | 5.45 | 2.74 |
| 2021 | 3.52 | 4.93 | 2.61 |
| 2020 | 4.22 | 5.48 | 3.53 |
| 2019 | 4.5 | 6.59 | 3.57 |
| 2018 | 6.24 | 9.32 | 3.95 |
| 2017 | 10.44 | 12.27 | 8.77 |
| 2016 | 13.76 | 18.11 | 11.39 |
| 2015 | 18.59 | 31.58 | 12.39 |
| 2014 | 9.95 | 14.33 | 6.7 |
| 2013 | 6.02 | 10.45 | 4.79 |
| 2012 | 6.36 | 7.87 | 4.87 |
| 2011 | 8.73 | 11.24 | 5.98 |