| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.62 | 10.22 | 7.33 |
| 2024 | 5.85 | 10.35 | 3.36 |
| 2023 | 8.09 | 16.61 | 4.25 |
| 2022 | 7.71 | 15.29 | 5.78 |
| 2021 | 4.78 | 6.47 | 3.46 |
| 2020 | 5.26 | 6.77 | 4.26 |
| 2019 | 6.06 | 8.17 | 5.13 |
| 2018 | 6.76 | 9.58 | 3.87 |
| 2017 | 10.57 | 17.63 | 7.23 |
| 2016 | 13.25 | 21.27 | 8.82 |
| 2015 | 9.56 | 17.04 | 5.92 |
| 2014 | 5.49 | 7.63 | 4.33 |
| 2013 | 4.99 | 6.31 | 4.22 |
| 2012 | 4.65 | 5.61 | 3.53 |
| 2011 | 5.66 | 7.21 | 3.75 |
| 2010 | 5.99 | 7.57 | 4.15 |
| 2009 | 4.85 | 8.29 | 3.15 |
| 2008 | 3.9 | 6.51 | 2.12 |
| 2007 | 4.99 | 8.11 | 1.26 |
| 2006 | 1.28 | 1.94 | 0.96 |
| 2005 | 1.06 | 1.42 | 0.73 |
| 2004 | 1.93 | 2.61 | 1.36 |
| 2003 | 2.64 | 3.59 | 2 |
| 2002 | 4.88 | 5.49 | 4.36 |