| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.41 | 4.71 | 2.71 |
| 2024 | 2.53 | 3.92 | 1.6 |
| 2023 | 3.28 | 3.84 | 2.65 |
| 2022 | 3.29 | 4.2 | 2.76 |
| 2021 | 3.5 | 5.07 | 2.37 |
| 2020 | 1.85 | 2.99 | 1.18 |
| 2019 | 1.43 | 1.84 | 1.13 |
| 2018 | 1.42 | 1.94 | 1.04 |
| 2017 | 2.59 | 3.62 | 1.78 |
| 2016 | 5.56 | 8.17 | 3.33 |
| 2015 | 10.23 | 15.85 | 5.7 |
| 2014 | 7.85 | 11.65 | 5.51 |
| 2013 | 6.53 | 8.7 | 4.42 |
| 2012 | 9.09 | 10.98 | 6.63 |
| 2011 | 8.65 | 10.35 | 7 |
| 2010 | 8.64 | 11.02 | 6.32 |