| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 9.11 | 16.4 | 5.47 |
| 2025 | 4.7 | 6.42 | 3.69 |
| 2024 | 3.27 | 5.33 | 1.99 |
| 2023 | 2.88 | 4.47 | 1.88 |
| 2022 | 2.18 | 3 | 1.7 |
| 2021 | 3.29 | 4.48 | 2.74 |
| 2020 | 4.78 | 5.55 | 3.95 |
| 2019 | 5.24 | 6.81 | 4.09 |
| 2018 | 5.23 | 6.68 | 3.97 |
| 2017 | 5.25 | 7.04 | 3.83 |
| 2016 | 5.01 | 6.87 | 3.65 |
| 2015 | 4 | 5.99 | 2.43 |
| 2014 | 3.72 | 4.56 | 3.08 |
| 2013 | 3.23 | 4.26 | 2.32 |
| 2012 | 3.28 | 4.58 | 1.95 |
| 2011 | 5.71 | 7.6 | 4.65 |
| 2010 | 6.35 | 7.79 | 5.3 |