| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 12.87 | 15.32 | 9.72 |
| 2023 | 17.22 | 20.97 | 14.36 |
| 2022 | 20.19 | 24.43 | 14.8 |
| 2021 | 24.75 | 34.42 | 18.86 |
| 2020 | 20.03 | 26.44 | 14.59 |
| 2019 | 14.97 | 18.3 | 10.36 |
| 2018 | 13.33 | 17.34 | 9.2 |
| 2017 | 13.19 | 16.2 | 11.28 |
| 2016 | 9.81 | 11.68 | 7.31 |
| 2015 | 7.78 | 9.81 | 6.36 |
| 2014 | 5.56 | 6.93 | 4.32 |
| 2013 | 6.54 | 9.1 | 4.53 |
| 2012 | 11.62 | 14.01 | 8.17 |
| 2011 | 14.63 | 17.56 | 12.31 |
| 2010 | 14.51 | 18.25 | 11.64 |
| 2009 | 14.63 | 17.78 | 10.16 |
| 2008 | 19.69 | 35.3 | 8.74 |
| 2007 | 23.41 | 35.56 | 16.73 |
| 2006 | 10.19 | 18.02 | 5.12 |
| 2005 | 5.53 | 7.11 | 3.21 |
| 2004 | 3.51 | 5.1 | 2.48 |