| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.03 | 2.77 | 1.6 |
| 2024 | 1.36 | 2.08 | 1.03 |
| 2023 | 1.63 | 1.78 | 1.45 |
| 2022 | 1.62 | 2.15 | 1.27 |
| 2021 | 1.35 | 1.73 | 1.16 |
| 2020 | 1.54 | 2.11 | 1.1 |
| 2019 | 1.05 | 1.68 | 0.54 |
| 2018 | 1.07 | 1.85 | 0.57 |
| 2017 | 2 | 2.59 | 1.54 |
| 2016 | 2.91 | 4 | 2.25 |
| 2015 | 4.61 | 8.83 | 2.35 |
| 2014 | 7.76 | 12.77 | 3.18 |
| 2013 | 5.53 | 7.83 | 3.86 |
| 2012 | 4.88 | 6.29 | 3.11 |
| 2011 | 6.7 | 8.22 | 5.49 |
| 2010 | 6.24 | 7.86 | 3.98 |
| 2009 | 5.79 | 12.27 | 5.01 |