| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2022 | 5.92 | 7.4834 | 4.5571 |
| 2021 | 6.97 | 9.3262 | 5.1161 |
| 2020 | 5.54 | 7.3895 | 4.1740 |
| 2019 | 2.93 | 4.2962 | 2.0026 |
| 2018 | 2.44 | 2.8932 | 2.0120 |
| 2017 | 2.44 | 2.8053 | 2.1138 |
| 2016 | 2.13 | 2.4425 | 1.8583 |
| 2015 | 2.35 | 3.5772 | 1.6137 |
| 2014 | 1.41 | 1.7610 | 1.2186 |
| 2013 | 1.21 | 1.4140 | 0.9632 |
| 2012 | 0.88 | 0.9731 | 0.7674 |
| 2011 | 0.94 | 1.0389 | 0.8069 |