| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.62 | 20.22 | 8.04 |
| 2024 | 7.27 | 12.94 | 4.64 |
| 2023 | 6.85 | 10.93 | 2.41 |
| 2022 | 2.38 | 3.27 | 1.71 |
| 2021 | 3.23 | 4.53 | 2.7 |
| 2020 | 3.86 | 5.67 | 2.7 |
| 2019 | 2.2 | 4.04 | 1.11 |
| 2018 | 1.52 | 2.25 | 0.99 |
| 2017 | 3.03 | 3.71 | 2.09 |
| 2016 | 5.03 | 11.44 | 3.58 |
| 2015 | 9.68 | 17.8 | 4.78 |
| 2014 | 9.07 | 12.19 | 6.9 |
| 2013 | 5.55 | 11.86 | 2.73 |
| 2012 | 4.16 | 6.5 | 2.31 |
| 2011 | 5.87 | 9.09 | 4.04 |
| 2010 | 7.58 | 9.73 | 5.67 |
| 2009 | 6.24 | 7.62 | 5.24 |