| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 1.6 | 1.89 | 1.07 |
| 2023 | 2.53 | 3.31 | 1.83 |
| 2022 | 3.06 | 4.11 | 2.47 |
| 2021 | 5 | 7.22 | 3.16 |
| 2020 | 8.14 | 10.24 | 5.63 |
| 2019 | 6.65 | 8.76 | 4.75 |
| 2018 | 8.85 | 11.48 | 5.27 |
| 2017 | 6.52 | 7.26 | 5.65 |
| 2016 | 7.36 | 9.48 | 6.11 |
| 2015 | 9.22 | 13.94 | 6.09 |
| 2014 | 5.98 | 7.23 | 4.52 |
| 2013 | 3.66 | 5.09 | 2.92 |
| 2012 | 4.11 | 5.54 | 2.46 |
| 2011 | 7.97 | 11.9 | 4.68 |
| 2010 | 12.12 | 13.98 | 10.72 |