| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 11.28 | 12.95 | 8.81 |
| 2024 | 10.98 | 18.5 | 7.76 |
| 2023 | 10.76 | 18.56 | 8.72 |
| 2022 | 9.78 | 11.56 | 7.45 |
| 2021 | 8.84 | 11.6 | 7.4 |
| 2020 | 11.1 | 20.67 | 7.84 |
| 2019 | 10.03 | 15.18 | 7.73 |
| 2018 | 14.01 | 19.13 | 9.15 |
| 2017 | 23.13 | 34.04 | 16.78 |
| 2016 | 29.61 | 37.41 | 25.58 |
| 2015 | 27.99 | 38.1 | 19.87 |
| 2014 | 17.87 | 30.58 | 12.9 |
| 2013 | 15.27 | 19.95 | 12.52 |
| 2012 | 18.68 | 24.75 | 13.98 |
| 2011 | 33.25 | 49.95 | 16.04 |
| 2010 | 29.27 | 43.7 | 19.95 |
| 2009 | 20.16 | 25.61 | 11.11 |
| 2008 | 15.39 | 25.23 | 7.79 |
| 2007 | 19.99 | 37.89 | 9 |
| 2006 | 9.21 | 12.91 | 7.18 |
| 2005 | 6.05 | 8.33 | 2.66 |
| 2004 | 5.8 | 8.45 | 4.04 |