| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.29 | 4.15 | 2.42 |
| 2023 | 3.77 | 4.46 | 2.88 |
| 2022 | 3.6 | 4.69 | 2.82 |
| 2021 | 5.55 | 7.33 | 3.61 |
| 2020 | 8.16 | 10.7 | 5.72 |
| 2019 | 6.85 | 8.54 | 5.41 |
| 2018 | 11.33 | 14.49 | 6.14 |
| 2017 | 9.73 | 10.78 | 8.67 |
| 2016 | 10.82 | 13.51 | 9.25 |
| 2015 | 15.38 | 23.57 | 10.4 |
| 2014 | 12.48 | 14.43 | 10.21 |
| 2013 | 9.08 | 11.49 | 7.44 |
| 2012 | 10.26 | 13.98 | 6.26 |
| 2011 | 21.08 | 32.58 | 11.79 |
| 2010 | 33.77 | 40.82 | 29.83 |