| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.7 | 6.61 | 5.03 |
| 2024 | 6.2 | 9.16 | 4.38 |
| 2023 | 11.02 | 15.12 | 7.52 |
| 2022 | 16.08 | 20.71 | 10.92 |
| 2021 | 28.69 | 39.52 | 20.35 |
| 2020 | 24.92 | 35.58 | 16.44 |
| 2019 | 15.93 | 22.95 | 10.5 |
| 2018 | 14.63 | 20.31 | 11.14 |
| 2017 | 11.94 | 13.91 | 10.74 |
| 2016 | 12.92 | 15.38 | 11.43 |
| 2015 | 13.3 | 18.51 | 9.24 |
| 2014 | 9.24 | 11.24 | 7.71 |
| 2013 | 6.7 | 9.58 | 4.85 |
| 2012 | 6 | 7.67 | 4.28 |
| 2011 | 7.67 | 9.55 | 6.11 |
| 2010 | 8.48 | 10.24 | 6.1 |