| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 16.05 | 20.97 | 8.74 |
| 2024 | 8.48 | 15.89 | 5.11 |
| 2023 | 7.66 | 12.21 | 3.39 |
| 2022 | 3.18 | 5.85 | 1.63 |
| 2021 | 2.24 | 2.87 | 1.75 |
| 2020 | 3.1 | 4.12 | 2.52 |
| 2019 | 3.4 | 4.97 | 2.71 |
| 2018 | 4.22 | 5.95 | 3.01 |
| 2017 | 8.35 | 11.81 | 5.35 |
| 2016 | 9.87 | 12.14 | 8.62 |
| 2015 | 9.35 | 15.39 | 5.58 |
| 2014 | 5.05 | 10.4 | 3.68 |
| 2013 | 3.82 | 4.42 | 3.05 |
| 2012 | 3.56 | 4.42 | 2.85 |
| 2011 | 5.16 | 7.34 | 3.3 |
| 2010 | 6.81 | 9.34 | 4.83 |
| 2009 | 6.22 | 9.24 | 3.18 |
| 2008 | 5.99 | 13.99 | 2.1 |
| 2007 | 10.52 | 14.02 | 7.78 |
| 2006 | 5.98 | 8.15 | 4.13 |
| 2005 | 5.96 | 7.84 | 4.17 |