| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.48 | 0.53 | 0.43 |
| 2024 | 0.42 | 0.65 | 0.27 |
| 2023 | 0.47 | 0.54 | 0.39 |
| 2022 | 0.5 | 0.67 | 0.38 |
| 2021 | 0.48 | 0.97 | 0.3 |
| 2020 | 0.3 | 0.35 | 0.27 |
| 2019 | 0.33 | 0.44 | 0.22 |
| 2018 | 0.27 | 0.37 | 0.22 |
| 2017 | 0.34 | 0.46 | 0.27 |
| 2016 | 0.34 | 0.43 | 0.26 |
| 2015 | 0.39 | 0.67 | 0.23 |
| 2014 | 0.29 | 0.45 | 0.15 |
| 2013 | 85.52 | 495.92 | 0.21 |
| 2012 | 97.8 | 324.38 | 33.13 |
| 2011 | 48.57 | 62.32 | 34.01 |
| 2010 | 39.07 | 49.39 | 26.69 |
| 2009 | 28.49 | 52.56 | 12.25 |
| 2008 | 18.53 | 29.06 | 7.1 |
| 2007 | 16.15 | 31.06 | 5.92 |
| 2006 | 5.03 | 7.07 | 3.64 |
| 2005 | 3.36 | 4.92 | 2.06 |
| 2004 | 3.55 | 7.47 | 1.72 |