| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.04 | 1.09 | 0.93 |
| 2024 | 1.14 | 1.4 | 0.93 |
| 2023 | 1.81 | 2.69 | 1.15 |
| 2022 | 3.08 | 4.25 | 2.03 |
| 2021 | 3.29 | 4.22 | 2.58 |
| 2020 | 4.87 | 6.45 | 3.14 |
| 2019 | 5.87 | 7.2 | 4.71 |
| 2018 | 9.41 | 14.14 | 4.53 |
| 2017 | 39.11 | 123.74 | 10.07 |
| 2016 | 13.92 | 112.27 | 4.3 |
| 2015 | 5.53 | 10.95 | 3.23 |
| 2014 | 3.77 | 4.97 | 2.52 |
| 2013 | 2.56 | 3.31 | 1.96 |
| 2012 | 3.2 | 4.45 | 2.28 |
| 2011 | 3.89 | 5.57 | 2.46 |
| 2010 | 4.26 | 5.32 | 3.2 |
| 2009 | 3.72 | 5.14 | 2.53 |
| 2008 | 3.27 | 4.91 | 1.79 |