| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2021 | 56.7 | 67 | 49.95 |
| 2020 | 62.68 | 82.49 | 46.69 |
| 2019 | 38.75 | 51.03 | 23.99 |
| 2018 | 40.33 | 52.58 | 23.85 |
| 2017 | 47.14 | 56.41 | 37.36 |
| 2016 | 37.09 | 46.18 | 29.2 |
| 2015 | 53.93 | 71.59 | 38.65 |
| 2014 | 57.21 | 74.16 | 40.78 |
| 2013 | 48.05 | 61.61 | 38.49 |
| 2012 | 38.88 | 47.68 | 29.95 |
| 2011 | 56.47 | 72.73 | 37.53 |