| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.27 | 5.16 | 3.31 |
| 2024 | 3.75 | 5.62 | 2.18 |
| 2023 | 4.8 | 5.82 | 3.95 |
| 2022 | 4.72 | 6.39 | 3.49 |
| 2021 | 6.65 | 10.49 | 4.12 |
| 2020 | 8.26 | 11.58 | 4.72 |
| 2019 | 5.83 | 7.5 | 4.66 |
| 2018 | 6.85 | 10.95 | 3.22 |
| 2017 | 11.2 | 15.53 | 8.04 |
| 2016 | 14.98 | 17.16 | 11.02 |
| 2015 | 9.88 | 16.1 | 4.88 |
| 2014 | 3.74 | 5.46 | 3 |
| 2013 | 4.13 | 4.74 | 3.36 |
| 2012 | 4.89 | 7.02 | 3.86 |
| 2011 | 9.24 | 12.67 | 4.55 |
| 2010 | 11.42 | 15.83 | 7.96 |
| 2009 | 12.17 | 15.8 | 8.82 |
| 2008 | 19.37 | 37.38 | 8.26 |
| 2007 | 27.81 | 48.83 | 8.48 |
| 2006 | 6.86 | 9.24 | 4.44 |
| 2005 | 4.08 | 5.45 | 2.61 |
| 2004 | 5.27 | 8.21 | 3.41 |