| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.57 | 2.94 | 2.1 |
| 2024 | 1.58 | 3.86 | 1.05 |
| 2023 | 1.81 | 2.44 | 1.36 |
| 2022 | 3.02 | 4.43 | 2.2 |
| 2021 | 3.27 | 5.28 | 2.01 |
| 2020 | 2.26 | 2.87 | 1.8 |
| 2019 | 1.65 | 1.93 | 1.28 |
| 2018 | 1.92 | 2.87 | 1.17 |
| 2017 | 2.78 | 3.64 | 2.28 |
| 2016 | 7.13 | 15.86 | 2.9 |
| 2015 | 15.85 | 30.88 | 7.43 |
| 2014 | 11.74 | 16.21 | 8.56 |
| 2013 | 4.65 | 10.09 | 2.42 |
| 2012 | 3.09 | 3.84 | 2.2 |
| 2011 | 4.25 | 5.28 | 2.32 |
| 2010 | 8.34 | 20.18 | 3.9 |
| 2009 | 17.53 | 22.81 | 7.69 |