| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.45 | 7.74 | 3.6 |
| 2024 | 3.67 | 5.84 | 2.5 |
| 2023 | 4.33 | 5.44 | 3.31 |
| 2022 | 2.44 | 4.06 | 1.85 |
| 2021 | 1.92 | 2.82 | 0.99 |
| 2020 | 2.51 | 3.49 | 1.39 |
| 2019 | 2.23 | 3.51 | 1.34 |
| 2018 | 1.91 | 2.76 | 1.34 |
| 2017 | 2.74 | 5.07 | 1.7 |
| 2016 | 13.72 | 19.99 | 4.6 |
| 2015 | 14.14 | 26.31 | 6.88 |
| 2014 | 6.88 | 9.18 | 4.43 |
| 2013 | 4.14 | 6.63 | 2.48 |
| 2012 | 3.63 | 5 | 2.26 |
| 2011 | 5.35 | 6.56 | 3.89 |
| 2010 | 5.18 | 6.49 | 3.96 |
| 2009 | 4.19 | 5.27 | 3.3 |