| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.11 | 11.69 | 8.93 |
| 2024 | 9.62 | 13.38 | 6.64 |
| 2023 | 11.81 | 15.88 | 9.52 |
| 2022 | 13.44 | 17.05 | 10.39 |
| 2021 | 9.45 | 17.52 | 5.82 |
| 2020 | 6.1 | 6.97 | 5.22 |
| 2019 | 5.98 | 7.49 | 4.58 |
| 2018 | 5.05 | 6.64 | 3.91 |
| 2017 | 7.39 | 11.06 | 4.86 |
| 2016 | 5.1 | 14.46 | 2.04 |
| 2015 | 2.9 | 5.14 | 2 |
| 2014 | 1.8 | 2.2 | 1.55 |
| 2013 | 2 | 2.66 | 1.62 |
| 2012 | 2.56 | 3.64 | 1.89 |
| 2011 | 6.59 | 13.18 | 2.43 |
| 2010 | 4.89 | 6.73 | 3.44 |
| 2009 | 4.56 | 5.82 | 3.2 |
| 2008 | 5.39 | 10.98 | 1.91 |
| 2007 | 7.13 | 10.45 | 4.92 |
| 2006 | 3.52 | 5.74 | 2.39 |
| 2005 | 1.87 | 2.64 | 1.05 |
| 2004 | 1.82 | 3.53 | 1.14 |