| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.48 | 6.14 | 3.11 |
| 2024 | 1.2 | 3.71 | 0.7 |
| 2023 | 0.71 | 1.3 | 0.35 |
| 2022 | 0.48 | 0.98 | 0.34 |
| 2021 | 0.42 | 0.54 | 0.31 |
| 2020 | 0.47 | 0.65 | 0.35 |
| 2019 | 0.39 | 0.48 | 0.34 |
| 2018 | 0.6 | 0.99 | 0.34 |
| 2017 | 0.76 | 0.99 | 0.64 |
| 2016 | 0.69 | 1.11 | 0.55 |
| 2015 | 1.14 | 2.08 | 0.69 |
| 2014 | 0.72 | 0.88 | 0.6 |
| 2013 | 0.69 | 0.9 | 0.59 |
| 2012 | 0.69 | 0.84 | 0.55 |
| 2011 | 0.92 | 1.15 | 0.67 |
| 2010 | 1.16 | 1.52 | 0.98 |
| 2009 | 1.26 | 1.53 | 1.07 |