| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.87 | 4.8 | 2.8 |
| 2024 | 2.61 | 4.71 | 1.61 |
| 2023 | 7.56 | 21.99 | 2.76 |
| 2022 | 4.51 | 13.78 | 1.46 |
| 2021 | 1.97 | 2.67 | 1.33 |
| 2020 | 1.19 | 1.73 | 0.64 |
| 2019 | 0.78 | 1.2 | 0.4 |
| 2018 | 1.15 | 2.24 | 0.36 |
| 2017 | 2.72 | 3.24 | 2.24 |
| 2016 | 2 | 3.87 | 1.43 |
| 2015 | 2.22 | 3.93 | 1.45 |
| 2014 | 1.33 | 2.25 | 0.97 |
| 2013 | 1.17 | 1.47 | 0.86 |
| 2012 | 1.61 | 2.06 | 1.2 |
| 2011 | 3.25 | 5.26 | 1.58 |
| 2010 | 3.75 | 5.07 | 2.72 |
| 2009 | 6.21 | 10.33 | 4.31 |
| 2008 | 9.05 | 14.35 | 5.41 |
| 2007 | 10.97 | 25.43 | 6.59 |