| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.25 | 13.58 | 8.81 |
| 2024 | 8.7 | 12.65 | 5.33 |
| 2023 | 10.03 | 11.53 | 8.46 |
| 2022 | 9.76 | 13.68 | 6.95 |
| 2021 | 9.69 | 12.38 | 7.33 |
| 2020 | 7.98 | 11.19 | 5.22 |
| 2019 | 9.69 | 17.19 | 6.26 |
| 2018 | 12.66 | 20.02 | 4.38 |
| 2017 | 14.51 | 22.34 | 10.24 |
| 2016 | 17.87 | 25.42 | 13.43 |
| 2015 | 15.46 | 29 | 8.61 |
| 2014 | 10.95 | 13.28 | 8.63 |
| 2013 | 6.87 | 9.86 | 4.85 |
| 2012 | 5.48 | 6.78 | 4.25 |
| 2011 | 8.44 | 11.65 | 5.32 |
| 2010 | 5.56 | 7.63 | 4.38 |
| 2009 | 3.25 | 5.14 | 1.26 |
| 2008 | 2.46 | 5.07 | 0.88 |
| 2007 | 3.2 | 5.24 | 1.37 |
| 2006 | 1.36 | 1.88 | 0.82 |
| 2005 | 0.97 | 1.63 | 0.73 |
| 2004 | 1.45 | 2.78 | 0.85 |