| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0 | ||
| 2019 | 0 | ||
| 2018 | 5.47 | 7.81 | 4.27 |
| 2017 | 10.28 | 18.22 | 6.95 |
| 2016 | 14.14 | 19.45 | 7.2 |
| 2015 | 6.31 | 14.19 | 2.59 |
| 2014 | 3.61 | 6.12 | 2.55 |
| 2013 | 2.86 | 3.54 | 2.2 |
| 2012 | 3.39 | 4.4 | 2.42 |
| 2011 | 4.15 | 5.8 | 2.72 |
| 2010 | 5.51 | 8.65 | 3.77 |
| 2009 | 5.88 | 8.68 | 4.47 |
| 2008 | 5.16 | 8.22 | 3.26 |
| 2007 | 4.21 | 6.2 | 2.37 |
| 2006 | 2.26 | 2.89 | 1.56 |
| 2005 | 0.92 | 1.97 | 0.27 |
| 2004 | 0.61 | 1.18 | 0.38 |