| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.14 | 8.89 | 5.46 |
| 2024 | 9.46 | 14.19 | 6.1 |
| 2023 | 10.12 | 15.63 | 5.69 |
| 2022 | 5.91 | 8.92 | 4.46 |
| 2021 | 6.35 | 7.58 | 5.4 |
| 2020 | 9.83 | 15.4 | 7.42 |
| 2019 | 16.26 | 25.43 | 10.54 |
| 2018 | 11.26 | 16.06 | 7.24 |
| 2017 | 16.09 | 19.6 | 12.87 |
| 2016 | 13.25 | 17.82 | 8.98 |
| 2015 | 10.45 | 13.48 | 8.1 |
| 2014 | 10.27 | 13.71 | 7.78 |
| 2013 | 5.07 | 11.37 | 3.44 |
| 2012 | 5.04 | 7.67 | 3.33 |
| 2011 | 7.64 | 9.2 | 5.57 |
| 2010 | 6.74 | 9.87 | 4.76 |
| 2009 | 5.96 | 8.56 | 3.41 |
| 2008 | 3.68 | 5.85 | 2.04 |