| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.69 | 11.17 | 5.35 |
| 2024 | 5.45 | 7.04 | 4.33 |
| 2023 | 6.01 | 10.54 | 3.08 |
| 2022 | 2.95 | 4.06 | 2.23 |
| 2021 | 3.05 | 4.42 | 2.12 |
| 2020 | 5.25 | 7.94 | 2.55 |
| 2019 | 4.63 | 6.51 | 3.26 |
| 2018 | 5.21 | 6.83 | 3.63 |
| 2017 | 8.37 | 11.78 | 5.56 |
| 2016 | 15.33 | 27.41 | 9.64 |
| 2015 | 22.31 | 38.63 | 16.14 |
| 2014 | 15.12 | 25.12 | 3.99 |
| 2013 | 1.98 | 3.98 | 1.25 |
| 2012 | 3.24 | 4.53 | 1.71 |
| 2011 | 3.68 | 4.52 | 2.62 |
| 2010 | 4.43 | 5.11 | 3.54 |
| 2009 | 3.36 | 5.45 | 1.9 |
| 2008 | 2.47 | 5.02 | 1.08 |