| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 17.06 | 22.29 | 14.84 |
| 2024 | 14.78 | 24.49 | 10.01 |
| 2023 | 23.54 | 30.99 | 18.79 |
| 2022 | 29.64 | 44.04 | 21.98 |
| 2021 | 25.77 | 33.21 | 20.82 |
| 2020 | 27.75 | 33.15 | 23.51 |
| 2019 | 11.38 | 33.15 | 4.94 |
| 2018 | 4.73 | 9.54 | 1.63 |
| 2017 | 2.88 | 4.74 | 2 |
| 2016 | 4.84 | 6.01 | 3.32 |
| 2015 | 4.12 | 7.43 | 1.62 |
| 2014 | 1.8 | 2.81 | 1.13 |
| 2013 | 1.74 | 3.48 | 1.05 |
| 2012 | 2.6 | 3.93 | 1.15 |
| 2011 | 2.27 | 3.2 | 1.29 |
| 2010 | 2.12 | 3.91 | 1.57 |
| 2009 | 3.55 | 6.66 | 0.96 |
| 2008 | 3.18 | 11.04 | 0.61 |
| 2007 | 3.6 | 6.09 | 1.81 |
| 2006 | 2.58 | 3.33 | 1.9 |
| 2005 | 1.89 | 2.54 | 1.33 |
| 2004 | 2.6 | 4.36 | 1.48 |