| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 0 | ||
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 3.91 | 5.67 | 3.65 |
| 2020 | 3.65 | 3.65 | 3.65 |
| 2019 | 3.65 | 3.65 | 3.65 |
| 2018 | 2.84 | 3.65 | 2.7 |
| 2017 | 3.01 | 3.42 | 2.52 |
| 2016 | 2.02 | 3.49 | 1.73 |
| 2015 | 1.62 | 2.57 | 0.98 |
| 2014 | 1.19 | 1.41 | 1.01 |
| 2013 | 1.09 | 1.32 | 0.94 |
| 2012 | 1.29 | 1.59 | 0.98 |
| 2011 | 2.11 | 2.95 | 1.14 |
| 2010 | 4.19 | 5.91 | 2.39 |
| 2009 | 13.3 | 29.79 | 2.53 |
| 2008 | 11.45 | 24.7 | 2.55 |
| 2007 | 9.49 | 26.9 | 3.78 |
| 2006 | 3.2 | 4.02 | 2.86 |
| 2005 | 3.13 | 3.38 | 2.92 |