| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.02 | 2.53 | 1.72 |
| 2024 | 1.44 | 2.4 | 1.02 |
| 2023 | 2.63 | 5.7 | 1.34 |
| 2022 | 8.1 | 13.86 | 5.04 |
| 2021 | 10.67 | 18.11 | 5.94 |
| 2020 | 6.68 | 9.38 | 4.56 |
| 2019 | 4.59 | 6.42 | 3.56 |
| 2018 | 7.15 | 12.73 | 4.1 |
| 2017 | 19.75 | 26.53 | 11.67 |
| 2016 | 19.66 | 28.15 | 12.83 |
| 2015 | 15.47 | 22.41 | 8.71 |
| 2014 | 8.5 | 10.79 | 6.36 |
| 2013 | 6.82 | 9.45 | 4.69 |
| 2012 | 4.94 | 7.1 | 3.83 |
| 2011 | 8.78 | 11.79 | 5.07 |
| 2010 | 12.91 | 16.73 | 10.72 |