| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.18 | 11.88 | 8.07 |
| 2024 | 7.87 | 11.11 | 5.63 |
| 2023 | 8.37 | 11.28 | 5.78 |
| 2022 | 9.08 | 16.39 | 5.67 |
| 2021 | 12.11 | 18.78 | 8.5 |
| 2020 | 10.16 | 14.18 | 7.22 |
| 2019 | 11.29 | 17.36 | 7.88 |
| 2018 | 20.02 | 32.04 | 13.13 |
| 2017 | 32.96 | 47.03 | 23.33 |
| 2016 | 16.35 | 36.71 | 8.44 |
| 2015 | 8.59 | 13.82 | 5.19 |
| 2014 | 4.87 | 6.66 | 3.44 |
| 2013 | 4.6 | 6.8 | 3.3 |
| 2012 | 8.9 | 11.94 | 5.38 |
| 2011 | 11.19 | 16.92 | 4.93 |
| 2010 | 18.82 | 71.75 | 5.3 |
| 2009 | 29.3 | 76.75 | 11.94 |
| 2008 | 38.55 | 110.46 | 10.5 |
| 2007 | 38.92 | 71.49 | 11.95 |
| 2006 | 13.91 | 19.05 | 10.22 |
| 2005 | 8.68 | 13.45 | 3.08 |
| 2004 | 5.92 | 9.05 | 3.82 |