| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 12.11 | 14.24 | 9.54 |
| 2024 | 14.28 | 20.09 | 10.02 |
| 2023 | 13.7 | 16.26 | 11.33 |
| 2022 | 11.29 | 16.95 | 7.68 |
| 2021 | 12.78 | 25.56 | 6.68 |
| 2020 | 4.13 | 7.97 | 2.83 |
| 2019 | 5.19 | 9.5 | 3.56 |
| 2018 | 3.92 | 5.06 | 2.73 |
| 2017 | 5.41 | 6.99 | 4.22 |
| 2016 | 6.66 | 8.1 | 5.82 |
| 2015 | 6.65 | 11.12 | 5.12 |
| 2014 | 3.82 | 5.71 | 3.03 |
| 2013 | 4.47 | 5.93 | 3.52 |
| 2012 | 5.98 | 7.92 | 4.25 |
| 2011 | 6.3 | 7.73 | 4.53 |
| 2010 | 6.35 | 8.17 | 4.79 |
| 2009 | 3.5 | 5.47 | 1.31 |
| 2008 | 3.87 | 8.19 | 1.05 |
| 2007 | 4.1 | 6.22 | 1.58 |
| 2006 | 1.38 | 1.9 | 0.93 |
| 2005 | 1.23 | 1.57 | 0.96 |
| 2004 | 2.23 | 3.37 | 1.48 |
| 2003 | 3.28 | 3.96 | 2.24 |
| 2002 | 5.1 | 6.22 | 4.3 |
| 2001 | 6.61 | 7.81 | 4.98 |