| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.03 | 2.25 | 1.78 |
| 2024 | 1.47 | 2.67 | 0.99 |
| 2023 | 1.39 | 1.56 | 1.27 |
| 2022 | 1.73 | 2.74 | 1.3 |
| 2021 | 3.47 | 5.11 | 2.07 |
| 2020 | 5.09 | 7.35 | 2.42 |
| 2019 | 3.83 | 5.84 | 2.75 |
| 2018 | 9.31 | 11.56 | 4.13 |
| 2017 | 12.76 | 14.58 | 11.56 |
| 2016 | 13.6 | 22.45 | 7.81 |
| 2015 | 16.34 | 22.45 | 3.08 |
| 2014 | 2.8 | 3.77 | 2.06 |
| 2013 | 2.25 | 2.73 | 1.67 |
| 2012 | 2.94 | 3.69 | 2.26 |
| 2011 | 5.53 | 9.25 | 2.8 |
| 2010 | 0 | -9.08 | |
| 2009 | 6.04 | 8.14 | 4.27 |
| 2008 | 4.85 | 8.7 | 1.91 |
| 2007 | 8.43 | 12.57 | 5.78 |