| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.95 | 4.03 | 2.45 |
| 2024 | 2.56 | 3.18 | 2.01 |
| 2023 | 3.96 | 5.38 | 2.66 |
| 2022 | 6.87 | 12.15 | 4.79 |
| 2021 | 7.12 | 18.64 | 2.02 |
| 2020 | 3.14 | 5.1 | 2.21 |
| 2019 | 2.38 | 2.89 | 1.93 |
| 2018 | 2.46 | 3.47 | 1.76 |
| 2017 | 4.88 | 7.03 | 3.24 |
| 2016 | 7.21 | 8.99 | 5.47 |
| 2015 | 8.88 | 16.5 | 4.94 |
| 2014 | 3.5 | 5.54 | 2.65 |
| 2013 | 2.61 | 3.24 | 2 |
| 2012 | 3.48 | 4.69 | 2.26 |
| 2011 | 6.88 | 9.24 | 3.66 |
| 2010 | 8.61 | 10.78 | 6.13 |