| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.97 | 12.29 | 7.98 |
| 2024 | 5.56 | 12.84 | 2.36 |
| 2023 | 4.99 | 9.66 | 1.23 |
| 2022 | 1.89 | 3.25 | 1.26 |
| 2021 | 2.34 | 3.73 | 1.3 |
| 2020 | 2.62 | 3.76 | 2.07 |
| 2019 | 1.78 | 3.58 | 0.84 |
| 2018 | 1.09 | 1.69 | 0.67 |
| 2017 | 2.39 | 2.83 | 1.57 |
| 2016 | 2.36 | 3.02 | 1.29 |
| 2015 | 2.54 | 5.46 | 1.52 |
| 2014 | 1.66 | 2.27 | 1.12 |
| 2013 | 1.33 | 1.88 | 1.01 |
| 2012 | 1.04 | 1.23 | 0.77 |
| 2011 | 1.96 | 3.09 | 0.94 |
| 2010 | 3.03 | 5.81 | 1.67 |
| 2009 | 2.38 | 5.12 | 0.84 |
| 2008 | 1.48 | 2.76 | 0.6 |
| 2007 | 2.03 | 4.14 | 0.83 |
| 2006 | 0.95 | 1.23 | 0.81 |
| 2005 | 1.24 | 1.71 | 0.9 |
| 2004 | 1.94 | 3.27 | 1.2 |