| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.35 | 6.42 | 4.8 |
| 2024 | 4.2 | 6.54 | 3.18 |
| 2023 | 3.41 | 4.97 | 1.77 |
| 2022 | 1.91 | 2.24 | 1.55 |
| 2021 | 1.81 | 2.36 | 1.27 |
| 2020 | 1.76 | 3.8 | 0.94 |
| 2019 | 1.19 | 1.91 | 0.74 |
| 2018 | 1.02 | 1.57 | 0.68 |
| 2017 | 1.4 | 1.86 | 1.13 |
| 2016 | 2.33 | 4.61 | 1.48 |
| 2015 | 5.42 | 11.1 | 2.79 |
| 2014 | 2.57 | 3.42 | 1.82 |
| 2013 | 2 | 2.41 | 1.74 |
| 2012 | 2.15 | 2.7 | 1.49 |
| 2011 | 3.96 | 5.87 | 2.19 |
| 2010 | 4.98 | 6.15 | 4.11 |
| 2009 | 2.87 | 4.62 | 1.71 |
| 2008 | 3.11 | 6.71 | 1.45 |
| 2007 | 4.65 | 7.07 | 2.54 |
| 2006 | 3.44 | 5.28 | 2.56 |
| 2005 | 2.62 | 3.48 | 1.88 |
| 2004 | 1.94 | 2.74 | 1.23 |