| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.35 | 3.07 | 2.06 |
| 2024 | 1.84 | 2.57 | 1.01 |
| 2023 | 0.52 | 1.17 | 0.15 |
| 2022 | 1.42 | 2.34 | 1.02 |
| 2021 | 2.27 | 2.99 | 1.73 |
| 2020 | 1.96 | 2.22 | 1.76 |
| 2019 | 3.36 | 5.54 | 1.97 |
| 2018 | 5.6 | 6.8 | 4.61 |
| 2017 | 7.19 | 8 | 6.66 |
| 2016 | 7.81 | 8.39 | 7 |
| 2015 | 6.08 | 8.74 | 4.09 |
| 2014 | 4.14 | 4.98 | 3.09 |
| 2013 | 4.65 | 5.51 | 3.85 |
| 2012 | 2.29 | 3.85 | 1.48 |
| 2011 | 3.54 | 6.75 | 1.46 |
| 2010 | 6.11 | 6.98 | 5.09 |
| 2009 | 4.55 | 7.48 | 2.8 |
| 2008 | 6.25 | 14.26 | 2.22 |
| 2007 | 12.36 | 18.49 | 6.73 |
| 2006 | 4.85 | 7.1 | 3.01 |
| 2005 | 0.61 | 2.97 | 0.08 |
| 2004 | 0.13 | 0.22 | 0.08 |