| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.44 | 3.27 | 1.89 |
| 2024 | 1.79 | 4.33 | 0.69 |
| 2023 | 0.94 | 1.05 | 0.74 |
| 2022 | 0.78 | 0.92 | 0.64 |
| 2021 | 0.99 | 1.28 | 0.8 |
| 2020 | 1.33 | 2 | 0.97 |
| 2019 | 1.18 | 1.97 | 0.86 |
| 2018 | 1.11 | 1.42 | 0.84 |
| 2017 | 1.85 | 2.42 | 1.36 |
| 2016 | 2.47 | 3.06 | 2.03 |
| 2015 | 4.04 | 7.44 | 2.09 |
| 2014 | 1.6 | 2.64 | 1.05 |
| 2013 | 1.37 | 1.65 | 1.14 |
| 2012 | 1.6 | 2.12 | 1.36 |
| 2011 | 1.91 | 2.78 | 1.28 |
| 2010 | 3.13 | 3.97 | 2.58 |
| 2009 | 2.03 | 3.51 | 0.93 |
| 2008 | 1.73 | 5.04 | 0.59 |
| 2007 | 3.25 | 5.8 | 1.1 |
| 2006 | 0.71 | 1.15 | 0.45 |
| 2005 | 0.54 | 0.65 | 0.44 |
| 2004 | 0.8 | 1.42 | 0.48 |