| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.55 | 20.46 | 12.84 |
| 2024 | 12.12 | 22.8 | 8.87 |
| 2023 | 4.2 | 11.79 | 2.97 |
| 2022 | 5.03 | 8.63 | 3.32 |
| 2021 | 3.45 | 5.74 | 2.78 |
| 2020 | 3.34 | 4.92 | 2.08 |
| 2019 | 4.36 | 6.2 | 3.34 |
| 2018 | 6.85 | 11.14 | 3.5 |
| 2017 | 10.68 | 12.29 | 9.63 |
| 2016 | 9.59 | 14.61 | 7.86 |
| 2015 | 8.58 | 15.81 | 4.57 |
| 2014 | 3.68 | 5.08 | 2.96 |
| 2013 | 3.41 | 3.96 | 2.79 |
| 2012 | 4.02 | 4.84 | 3.24 |
| 2011 | 5.85 | 8.09 | 3.98 |
| 2010 | 6.97 | 10.09 | 5.19 |
| 2009 | 4.39 | 7.2 | 2.63 |
| 2008 | 3.46 | 5.83 | 1.93 |
| 2007 | 4.27 | 5.6 | 3.21 |