| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.29 | 4.05 | 3.02 |
| 2024 | 3.19 | 4.16 | 2.64 |
| 2023 | 4.16 | 4.49 | 3.71 |
| 2022 | 4.03 | 4.97 | 3.52 |
| 2021 | 3.88 | 4.97 | 3.43 |
| 2020 | 4.36 | 4.89 | 3.86 |
| 2019 | 5.21 | 7.96 | 3.98 |
| 2018 | 5.69 | 8.95 | 3.85 |
| 2017 | 22.65 | 54.41 | 7.81 |
| 2016 | 21.11 | 33.96 | 16 |
| 2015 | 25.55 | 41.9 | 16.06 |
| 2014 | 12.49 | 19.89 | 7.76 |
| 2013 | 7.47 | 8.63 | 6.21 |
| 2012 | 8.13 | 9.95 | 6.6 |
| 2011 | 12.39 | 16.43 | 7.76 |
| 2010 | 15.59 | 18.87 | 12.59 |
| 2009 | 13.17 | 19.81 | 6.47 |
| 2008 | 11.28 | 26.07 | 4.98 |
| 2007 | 14.75 | 25.45 | 6.55 |
| 2006 | 6.57 | 7.55 | 5.5 |