| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 10.12 | 13.64 | 8.9 |
| 2024 | 7.56 | 12.47 | 4.39 |
| 2023 | 12.4 | 16.75 | 10.27 |
| 2022 | 15.12 | 24.92 | 12.29 |
| 2021 | 8.63 | 13.95 | 6.03 |
| 2020 | 10.65 | 17.42 | 6.56 |
| 2019 | 5.96 | 9.39 | 4.2 |
| 2018 | 7.62 | 11.73 | 3.96 |
| 2017 | 9.88 | 12.31 | 6.88 |
| 2016 | 6.61 | 12.33 | 3.71 |
| 2015 | 5.53 | 10.43 | 3.35 |
| 2014 | 2.59 | 4.55 | 1.55 |
| 2013 | 1.65 | 1.9 | 1.35 |
| 2012 | 1.67 | 2.25 | 1.26 |
| 2011 | 3.08 | 4.48 | 1.55 |
| 2010 | 3.23 | 4.48 | 2.17 |
| 2009 | 3.02 | 4.75 | 1.75 |
| 2008 | 2.3 | 4.27 | 0.97 |
| 2007 | 3.52 | 6.32 | 1.56 |
| 2006 | 1.71 | 2.05 | 1.29 |
| 2005 | 1.73 | 2.67 | 1.4 |
| 2004 | 2.55 | 4.35 | 1.69 |