| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.18 | 9.44 | 5.75 |
| 2024 | 6.47 | 8.41 | 5.19 |
| 2023 | 14.19 | 20.81 | 7.2 |
| 2022 | 13.35 | 19.96 | 9.33 |
| 2021 | 10.38 | 15.17 | 8.08 |
| 2020 | 6.7 | 10.03 | 3.97 |
| 2019 | 4.89 | 6.13 | 4.03 |
| 2018 | 5.23 | 6.34 | 3.67 |
| 2017 | 6.52 | 7.71 | 5.49 |
| 2016 | 5.79 | 7.8 | 4.88 |
| 2015 | 6.92 | 10.33 | 4.56 |
| 2014 | 4.93 | 5.88 | 3.63 |
| 2013 | 3.87 | 4.71 | 2.97 |
| 2012 | 5.37 | 7.85 | 3.55 |
| 2011 | 20.4 | 33.62 | 7 |
| 2010 | 16.79 | 23.03 | 12.54 |
| 2009 | 14.79 | 21.02 | 7.17 |
| 2008 | 9.27 | 16.98 | 4.15 |
| 2007 | 10.07 | 15.52 | 4.61 |
| 2006 | 4.3 | 6.48 | 3.05 |
| 2005 | 3.95 | 6.2 | 2.67 |
| 2004 | 8.72 | 16.54 | 4.27 |