| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.48 | 9.03 | 6.05 |
| 2024 | 5.04 | 8.6 | 3.74 |
| 2023 | 3.75 | 5.11 | 1.75 |
| 2022 | 7.28 | 21.19 | 1.69 |
| 2021 | 8.88 | 20.7 | 5.74 |
| 2020 | 3.5 | 6.53 | 2.97 |
| 2019 | 5.51 | 7.32 | 3.27 |
| 2018 | 8.26 | 13.15 | 4.67 |
| 2017 | 21.3 | 32.7 | 12.22 |
| 2016 | 23.79 | 46 | 15.07 |
| 2015 | 42.99 | 61.64 | 25.04 |
| 2014 | 46.22 | 72.54 | 22.53 |
| 2013 | 12.6 | 23.67 | 7.74 |
| 2012 | 13.17 | 19.08 | 7.74 |
| 2011 | 8.16 | 14.27 | 3.88 |
| 2010 | 4.29 | 5.36 | 3.16 |
| 2009 | 3.27 | 4.78 | 1.59 |
| 2008 | 4.17 | 8.91 | 1.39 |
| 2007 | 4.38 | 7.89 | 2.09 |
| 2006 | 1.63 | 2.21 | 1.05 |
| 2005 | 1 | 1.33 | 0.76 |
| 2004 | 1.36 | 2.16 | 0.9 |