| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.38 | 1.62 | 1.14 |
| 2024 | 1.33 | 1.9 | 0.94 |
| 2023 | 2.28 | 3.06 | 1.82 |
| 2022 | 1.34 | 2.14 | 0.97 |
| 2021 | 1.19 | 1.54 | 0.92 |
| 2020 | 1.52 | 2.11 | 0.96 |
| 2019 | 1.83 | 2.78 | 1.38 |
| 2018 | 3.47 | 6.11 | 1.92 |
| 2017 | 6.6 | 9.04 | 4.4 |
| 2016 | 14.66 | 27.86 | 7.89 |
| 2015 | 28.91 | 60.88 | 13.96 |
| 2014 | 12.93 | 19.99 | 7.11 |
| 2013 | 6.77 | 9.59 | 4.92 |
| 2012 | 7.69 | 10.64 | 5.13 |
| 2011 | 12.7 | 22.56 | 8.48 |
| 2010 | 21.7 | 27.54 | 18.25 |