| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 30.16 | 32.5 | 25.51 |
| 2024 | 24.29 | 35.6 | 18.75 |
| 2023 | 31.39 | 41.14 | 23.58 |
| 2022 | 32.3 | 41.42 | 26.42 |
| 2021 | 27.42 | 35.08 | 22.99 |
| 2020 | 29.65 | 38.11 | 21.8 |
| 2019 | 32.4 | 54.06 | 24.16 |
| 2018 | 22.26 | 39.65 | 8.73 |
| 2017 | 3.75 | 3.98 | 3.47 |
| 2016 | 5.66 | 9.6 | 3.84 |
| 2015 | 7.79 | 16.27 | 2.6 |
| 2014 | 3.46 | 5.17 | 2.4 |
| 2013 | 7.42 | 15.31 | 4.53 |
| 2012 | 4.03 | 11.13 | 1.04 |
| 2011 | 2.19 | 3.64 | 1.2 |
| 2010 | 2.29 | 2.91 | 1.73 |
| 2009 | 1.6 | 2.42 | 0.57 |
| 2008 | 0.97 | 1.82 | 0.4 |
| 2007 | 1.19 | 1.93 | 0.43 |
| 2006 | 0.41 | 0.53 | 0.35 |
| 2005 | 0.36 | 0.45 | 0.27 |
| 2004 | 0.4 | 0.76 | 0.25 |