| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 19.58 | 23.71 | 17.09 |
| 2024 | 15.35 | 27.92 | 9.8 |
| 2023 | 22.77 | 31.95 | 14.56 |
| 2022 | 29 | 55.33 | 17.37 |
| 2021 | 14.72 | 36.94 | 6.92 |
| 2020 | 0.88 | 1.37 | 0.6 |
| 2019 | 0.62 | 0.95 | 0.36 |
| 2018 | 0.88 | 2.07 | 0.33 |
| 2017 | 5.6 | 13.36 | 1.91 |
| 2016 | 3.11 | 4.98 | 2.01 |
| 2015 | 3.42 | 7.59 | 2.15 |
| 2014 | 3.06 | 4.5 | 1.51 |
| 2013 | 1.81 | 2.31 | 1.55 |
| 2012 | 1.69 | 2.07 | 1.4 |
| 2011 | 2.59 | 3.46 | 1.79 |
| 2010 | 3.88 | 5.63 | 2.81 |
| 2009 | 3.42 | 4.28 | 2.38 |
| 2008 | 3.42 | 6.66 | 1.58 |
| 2007 | 4.62 | 7.04 | 1.56 |
| 2006 | 1.75 | 2.04 | 1.37 |
| 2005 | 2.1 | 2.91 | 1.7 |
| 2004 | 4.07 | 7.4 | 2.07 |