| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 12.74 | 23.38 | 4.56 |
| 2024 | 4.29 | 6.73 | 2.95 |
| 2023 | 5.98 | 8.06 | 4.37 |
| 2022 | 4.57 | 5.64 | 3.08 |
| 2021 | 4.14 | 4.98 | 3.58 |
| 2020 | 3.95 | 5.55 | 1.94 |
| 2019 | 1.5 | 2.37 | 1.09 |
| 2018 | 1.59 | 4.34 | 1.15 |
| 2017 | 5.58 | 6.93 | 4.57 |
| 2016 | 6.6 | 8.14 | 4.55 |
| 2015 | 7.89 | 14.62 | 4.47 |
| 2014 | 4.84 | 6.43 | 3.97 |
| 2013 | 4.22 | 6.81 | 2.65 |
| 2012 | 3.08 | 4.22 | 2.26 |
| 2011 | 5.36 | 8.38 | 3.5 |
| 2010 | 6.52 | 8.69 | 5.09 |
| 2009 | 5.11 | 6.46 | 3.49 |
| 2008 | 4.54 | 7.46 | 2.7 |
| 2007 | 5.51 | 8.07 | 4.27 |
| 2006 | 4.08 | 5.56 | 2.9 |
| 2005 | 2.4 | 2.95 | 1.73 |
| 2004 | 3.4 | 5.69 | 1.92 |