| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 8.81 | 10.01 | 7.33 |
| 2025 | 13.51 | 29.06 | 6.93 |
| 2024 | 7.98 | 19.69 | 3.31 |
| 2023 | 6.94 | 17.36 | 3.41 |
| 2022 | 12.69 | 18.74 | 6.81 |
| 2021 | 6.35 | 11.53 | 1.99 |
| 2020 | 2.35 | 3.63 | 1.15 |
| 2019 | 3.86 | 5.29 | 2.63 |
| 2018 | 4.75 | 7.3 | 3.1 |
| 2017 | 8.33 | 12.23 | 6.28 |
| 2016 | 8.85 | 15.38 | 6.12 |
| 2015 | 5.97 | 9.78 | 3.6 |
| 2014 | 3.55 | 4.3 | 2.45 |
| 2013 | 2.83 | 4.72 | 1.62 |
| 2012 | 1.67 | 1.99 | 1.32 |
| 2011 | 1.67 | 2.1 | 1.3 |
| 2010 | 2.13 | 2.98 | 1.38 |
| 2009 | 1.58 | 2.13 | 1.07 |
| 2008 | 1.55 | 3.19 | 0.63 |
| 2007 | 3.53 | 5.46 | 2.06 |