| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.97 | 5.71 | 4.08 |
| 2024 | 4.27 | 6 | 3.17 |
| 2023 | 5.81 | 7.3 | 4.91 |
| 2022 | 5.12 | 8.22 | 3.95 |
| 2021 | 6.18 | 9.01 | 4.26 |
| 2020 | 6.33 | 8.46 | 4.81 |
| 2019 | 5.06 | 6.34 | 4.04 |
| 2018 | 6.52 | 8.5 | 5.19 |
| 2017 | 8.67 | 12.42 | 6.05 |
| 2016 | 16.09 | 23.17 | 11.01 |
| 2015 | 16.67 | 34.6 | 8.19 |
| 2014 | 8.45 | 11.28 | 5.68 |
| 2013 | 5.68 | 7.4 | 4.02 |
| 2012 | 6.06 | 9.46 | 3.46 |
| 2011 | 10.77 | 14.5 | 8.9 |
| 2010 | 15.96 | 18.77 | 13.67 |