| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.59 | 4.24 | 3.03 |
| 2024 | 3.3 | 4.47 | 2.52 |
| 2023 | 4.57 | 5.48 | 3.21 |
| 2022 | 5.83 | 7.26 | 4.49 |
| 2021 | 7.02 | 9.67 | 5.31 |
| 2020 | 5.4 | 8.86 | 3.32 |
| 2019 | 4.11 | 4.93 | 3.57 |
| 2018 | 4.3 | 5.18 | 3.52 |
| 2017 | 4.53 | 5.16 | 3.69 |
| 2016 | 4.95 | 5.75 | 3.88 |
| 2015 | 5.6 | 9.23 | 3.6 |
| 2014 | 3.39 | 4.7 | 2.51 |
| 2013 | 2.63 | 3.06 | 2.18 |
| 2012 | 3.04 | 3.87 | 2.14 |
| 2011 | 3.25 | 4.06 | 2.64 |
| 2010 | 3.51 | 4.56 | 2.47 |
| 2009 | 3.11 | 4.07 | 2.07 |
| 2008 | 3.02 | 4.86 | 1.25 |
| 2007 | 6.92 | 11.24 | 3.21 |
| 2006 | 7.23 | 10.44 | 5.51 |
| 2005 | 5.99 | 9.55 | 3.86 |