| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 16.49 | 19.78 | 14.2 |
| 2024 | 11.35 | 27.35 | 5.85 |
| 2023 | 7.32 | 18.69 | 4.16 |
| 2022 | 3.76 | 5.81 | 2.49 |
| 2021 | 3.46 | 4.1 | 2.62 |
| 2020 | 5.19 | 6.66 | 3.69 |
| 2019 | 6.82 | 8.75 | 5.74 |
| 2018 | 8.79 | 14.13 | 6.01 |
| 2017 | 13.13 | 20.74 | 8.52 |
| 2016 | 15.58 | 21.83 | 10.66 |
| 2015 | 13.1 | 21.54 | 6.75 |
| 2014 | 5.84 | 10.63 | 3.06 |
| 2013 | 3.51 | 4.14 | 3.03 |
| 2012 | 4.34 | 6.07 | 3.05 |
| 2011 | 6.77 | 8.38 | 3.85 |
| 2010 | 9.17 | 12.41 | 7.32 |
| 2009 | 6.93 | 13.29 | 2.14 |
| 2008 | 2.73 | 4.65 | 1.38 |
| 2007 | 3.27 | 5.22 | 1.48 |
| 2006 | 2.27 | 3.03 | 1.47 |
| 2005 | 2.9 | 3.85 | 2.23 |
| 2004 | 5.01 | 9.24 | 2.81 |