| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.49 | 14.12 | 5.36 |
| 2024 | 4.69 | 7.04 | 3.16 |
| 2023 | 5.36 | 6.13 | 4.6 |
| 2022 | 5.64 | 7.86 | 4.09 |
| 2021 | 5.24 | 6.88 | 3.94 |
| 2020 | 5.04 | 6.13 | 4.15 |
| 2019 | 4.01 | 5.96 | 1.9 |
| 2018 | 1.13 | 2.24 | 0.67 |
| 2017 | 1.59 | 2.53 | 0.86 |
| 2016 | 5.07 | 11.06 | 2.12 |
| 2015 | 9.18 | 18.27 | 4.42 |
| 2014 | 3.28 | 5.48 | 2.22 |
| 2013 | 2.64 | 3.15 | 2.13 |
| 2012 | 2.56 | 3.13 | 2.07 |
| 2011 | 4.66 | 6.48 | 2.19 |
| 2010 | 6.73 | 9.33 | 4.89 |
| 2009 | 6.4 | 8.19 | 3.26 |
| 2008 | 11.33 | 25.64 | 2.47 |
| 2007 | 7.35 | 15.31 | 2.41 |
| 2006 | 2.54 | 3.21 | 1.83 |
| 2005 | 1.46 | 1.98 | 0.91 |
| 2004 | 2.02 | 4.21 | 1.06 |