| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.73 | 5.11 | 1.06 |
| 2024 | 1.09 | 1.86 | 0.7 |
| 2023 | 1.06 | 1.53 | 0.88 |
| 2022 | 1.14 | 1.49 | 0.86 |
| 2021 | 1.35 | 1.73 | 0.97 |
| 2020 | 1.12 | 1.54 | 0.87 |
| 2019 | 1.83 | 3.5 | 1.27 |
| 2018 | 2.61 | 3.39 | 2.01 |
| 2017 | 4.28 | 5.29 | 3.21 |
| 2016 | 4.37 | 5.53 | 3.03 |
| 2015 | 3.69 | 4.92 | 1.78 |
| 2014 | 1.43 | 2.16 | 1.07 |
| 2013 | 1.38 | 1.78 | 1.1 |
| 2012 | 1.69 | 2.03 | 1.4 |
| 2011 | 2.34 | 3.09 | 1.57 |
| 2010 | 2.32 | 2.99 | 1.91 |
| 2009 | 2.82 | 4.46 | 1.35 |
| 2008 | 3.26 | 5.81 | 1.03 |
| 2007 | 3.92 | 7.96 | 1.83 |
| 2006 | 1.8 | 2.28 | 1.5 |
| 2005 | 2.58 | 3.55 | 1.53 |
| 2004 | 3.76 | 4.79 | 2.46 |