| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 4.55 | 6.15 | 3.21 |
| 2023 | 7.22 | 8.34 | 6 |
| 2022 | 7.04 | 10.15 | 4.29 |
| 2021 | 8.14 | 10.35 | 6.88 |
| 2020 | 7.58 | 10.02 | 4.85 |
| 2019 | 3.87 | 5.36 | 3.08 |
| 2018 | 4.23 | 5.84 | 2.71 |
| 2017 | 4.77 | 6.84 | 3.44 |
| 2016 | 3.41 | 4.13 | 2.67 |
| 2015 | 4.26 | 7.4 | 2.72 |
| 2014 | 2.74 | 3.66 | 1.95 |
| 2013 | 2.35 | 2.88 | 1.85 |
| 2012 | 2.26 | 3.09 | 1.61 |
| 2011 | 4.44 | 7.41 | 2.66 |
| 2010 | 5.27 | 6.84 | 4.13 |
| 2009 | 5.27 | 10.18 | 3.17 |
| 2008 | 4.42 | 8.04 | 1.86 |
| 2007 | 4.3 | 7.94 | 2.23 |
| 2006 | 2.2 | 2.55 | 1.87 |