| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.42 | 10.36 | 2.76 |
| 2024 | 2.35 | 3.39 | 1.56 |
| 2023 | 2.43 | 2.89 | 1.67 |
| 2022 | 2.01 | 2.73 | 1.51 |
| 2021 | 2.14 | 2.94 | 1.72 |
| 2020 | 2.44 | 3.16 | 2.09 |
| 2019 | 2.69 | 3.21 | 2.15 |
| 2018 | 3.16 | 4.19 | 2.18 |
| 2017 | 4.88 | 6.48 | 3.82 |
| 2016 | 4.7 | 6.1 | 3.89 |
| 2015 | 5.5 | 9.24 | 3.43 |
| 2014 | 2.89 | 4.13 | 2.18 |
| 2013 | 2.79 | 3.44 | 2.03 |
| 2012 | 2.35 | 3.81 | 1.51 |
| 2011 | 4.52 | 8.07 | 2.78 |
| 2010 | 4.66 | 7.22 | 2.75 |
| 2009 | 3.29 | 5.45 | 1.25 |
| 2008 | 2.48 | 5.88 | 0.95 |
| 2007 | 7.56 | 14.19 | 4.5 |
| 2006 | 4.12 | 5.75 | 2.49 |
| 2005 | 2.77 | 3.86 | 2.06 |
| 2004 | 4.93 | 9.07 | 2.81 |