| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 5.32 | 6.23 | 4.51 |
| 2025 | 5.2 | 6.16 | 3.73 |
| 2024 | 3.24 | 6.74 | 1.38 |
| 2023 | 2.65 | 3.55 | 1.71 |
| 2022 | 3.23 | 3.69 | 2.9 |
| 2021 | 3.02 | 3.53 | 2.37 |
| 2020 | 2.51 | 2.84 | 2.21 |
| 2019 | 3.04 | 3.91 | 2.62 |
| 2018 | 3.47 | 4.63 | 2.77 |
| 2017 | 4.49 | 6.28 | 3.66 |
| 2016 | 7.16 | 8.78 | 5.54 |
| 2015 | 8.33 | 14.85 | 5.2 |
| 2014 | 3.57 | 6.47 | 2.62 |
| 2013 | 2.97 | 3.82 | 2.42 |
| 2012 | 2.89 | 3.46 | 2.46 |
| 2011 | 3.33 | 3.86 | 2.77 |
| 2010 | 4.55 | 6.53 | 3.31 |
| 2009 | 3.88 | 5.63 | 1.82 |
| 2008 | 2.8 | 4.55 | 1.48 |
| 2007 | 3.76 | 6.2 | 1.41 |
| 2006 | 1.09 | 1.44 | 0.82 |
| 2005 | 0.71 | 0.89 | 0.49 |
| 2004 | 0.81 | 1.25 | 0.53 |