| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.41 | 1.52 | 1.29 |
| 2024 | 1.28 | 1.59 | 1.01 |
| 2023 | 2.19 | 3.89 | 1.26 |
| 2022 | 3.19 | 4.3 | 2.01 |
| 2021 | 4.11 | 6.76 | 2.02 |
| 2020 | 2.33 | 3.56 | 1.77 |
| 2019 | 1.99 | 2.6 | 1.6 |
| 2018 | 2.22 | 3.36 | 1.59 |
| 2017 | 3.61 | 4.44 | 3.08 |
| 2016 | 4.06 | 5.38 | 2.6 |
| 2015 | 4.47 | 8.67 | 2.25 |
| 2014 | 3.28 | 5.13 | 2.52 |
| 2013 | 10.91 | 41.25 | 2.6 |
| 2012 | 16.26 | 30.22 | 7.27 |
| 2011 | 7.77 | 10.6 | 5.3 |
| 2010 | 6.28 | 8.09 | 4.88 |
| 2009 | 3.66 | 6.14 | 1.78 |
| 2008 | 2.21 | 3.63 | 0.92 |