| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 6.85 | 7.39 | 5.99 |
| 2025 | 8.2 | 12.91 | 5.31 |
| 2024 | 10.02 | 14.92 | 7.44 |
| 2023 | 17.34 | 25.96 | 13.04 |
| 2022 | 23.55 | 41.12 | 15.86 |
| 2021 | 232.2 | 258.1 | 205.14 |
| 2020 | 208.77 | 342.86 | 84.56 |
| 2019 | 0 | -1.17 | |
| 2018 | 1.32 | 2.14 | 0.73 |
| 2017 | 3.66 | 4.5 | 2.21 |
| 2016 | 9.55 | 42.4 | 3.76 |
| 2015 | 14.81 | 49.52 | 5.58 |
| 2014 | 5.27 | 7.22 | 4.03 |
| 2013 | 4.35 | 5.68 | 3.65 |
| 2012 | 4.2 | 5.47 | 3.5 |
| 2011 | 4.89 | 5.66 | 3.64 |
| 2010 | 4.98 | 6.72 | 3.66 |
| 2009 | 3.26 | 5.12 | 1.8 |
| 2008 | 2.56 | 4.63 | 1.31 |