| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 19.23 | 21.54 | 16.49 |
| 2024 | 14.24 | 19.19 | 10.47 |
| 2023 | 14.2 | 19.78 | 9.58 |
| 2022 | 9.39 | 12.23 | 6.9 |
| 2021 | 11.34 | 16.09 | 9.26 |
| 2020 | 11.51 | 13.89 | 9.01 |
| 2019 | 10.11 | 13.19 | 8.46 |
| 2018 | 12.79 | 19.17 | 8.28 |
| 2017 | 19.96 | 25.53 | 16.86 |
| 2016 | 26.54 | 38.75 | 19.61 |
| 2015 | 21.95 | 37.04 | 14.03 |
| 2014 | 14.7 | 21.31 | 11.3 |
| 2013 | 11.15 | 14.65 | 9.03 |
| 2012 | 10.07 | 11.96 | 8.01 |
| 2011 | 15.23 | 21.42 | 9.31 |
| 2010 | 16.46 | 22.93 | 11.81 |
| 2009 | 14.63 | 19.64 | 11.48 |