| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.13 | 19.48 | 9.75 |
| 2024 | 15.43 | 29.31 | 8.92 |
| 2023 | 14.28 | 18.58 | 8.91 |
| 2022 | 8.95 | 11.74 | 7.03 |
| 2021 | 8.48 | 13.33 | 7.14 |
| 2020 | 9.66 | 11.23 | 8.37 |
| 2019 | 10.16 | 13.81 | 8.65 |
| 2018 | 13.38 | 17.85 | 9.02 |
| 2017 | 19.35 | 23.78 | 16.23 |
| 2016 | 25.69 | 36.27 | 16.48 |
| 2015 | 24.36 | 43.96 | 13.82 |
| 2014 | 15.89 | 23.14 | 10.83 |
| 2013 | 12.11 | 18.02 | 8.02 |
| 2012 | 10.63 | 13.17 | 6.52 |
| 2011 | 18.41 | 27.26 | 10.76 |
| 2010 | 24.43 | 33.74 | 18.98 |
| 2009 | 17.45 | 22.41 | 10.06 |