| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 11.91 | 15.1 | 10.35 |
| 2024 | 10.9 | 22.13 | 6.31 |
| 2023 | 9.5 | 11.64 | 7.31 |
| 2022 | 6.53 | 10.03 | 2.92 |
| 2021 | 4.88 | 7.37 | 3.2 |
| 2020 | 9.64 | 11.64 | 4.91 |
| 2019 | 8.99 | 11.49 | 6.27 |
| 2018 | 6.73 | 8.27 | 5.37 |
| 2017 | 6.3 | 8.22 | 4.59 |
| 2016 | 8.12 | 10.98 | 5.37 |
| 2015 | 7.55 | 12.45 | 4.17 |
| 2014 | 4.48 | 6.28 | 3.4 |
| 2013 | 3.92 | 4.64 | 3.39 |
| 2012 | 4.35 | 5.67 | 3 |
| 2011 | 5.11 | 6.26 | 4.36 |
| 2010 | 4.9 | 6.27 | 3.79 |
| 2009 | 3.31 | 5 | 1.84 |
| 2008 | 2.88 | 4.85 | 1.14 |
| 2007 | 3.19 | 4.95 | 1.4 |
| 2006 | 1.61 | 2.14 | 1.29 |
| 2005 | 1.55 | 2.09 | 1.16 |
| 2004 | 2.28 | 3.05 | 1.9 |
| 2003 | 2.95 | 3.81 | 2.31 |