| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.97 | 4.44 | 3.53 |
| 2024 | 3.48 | 4.42 | 2.4 |
| 2023 | 3.03 | 3.73 | 2.67 |
| 2022 | 2.98 | 4.1 | 2.35 |
| 2021 | 3.81 | 5.04 | 2.85 |
| 2020 | 4.07 | 6.38 | 3.03 |
| 2019 | 3.97 | 5.25 | 3.29 |
| 2018 | 4.81 | 7.48 | 3.21 |
| 2017 | 8.42 | 10.47 | 6.54 |
| 2016 | 9.15 | 10.93 | 7.71 |
| 2015 | 12.99 | 20.08 | 7.34 |
| 2014 | 5.96 | 12.71 | 3.63 |
| 2013 | 4.19 | 5.3 | 3.55 |
| 2012 | 5.63 | 7.35 | 3.75 |
| 2011 | 10.01 | 16.85 | 5.73 |
| 2010 | 9.21 | 17.06 | 6.18 |
| 2009 | 5.88 | 7.42 | 4.21 |
| 2008 | 7.27 | 17.61 | 2.33 |
| 2007 | 10.99 | 18.96 | 4.18 |
| 2006 | 3.5 | 4.69 | 2.71 |
| 2005 | 2.44 | 3.55 | 1.72 |
| 2004 | 2.95 | 4.76 | 1.84 |