| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.29 | 0.37 | 0.25 |
| 2024 | 0.27 | 0.36 | 0.17 |
| 2023 | 0.37 | 0.43 | 0.32 |
| 2022 | 0.49 | 0.69 | 0.39 |
| 2021 | 0.55 | 0.75 | 0.4 |
| 2020 | 0.47 | 0.65 | 0.32 |
| 2019 | 0.51 | 0.67 | 0.43 |
| 2018 | 0.7 | 1 | 0.52 |
| 2017 | 1.37 | 1.87 | 0.85 |
| 2016 | 1.91 | 2.47 | 1.69 |
| 2015 | 2.96 | 4.45 | 1.8 |
| 2014 | 2.02 | 3.09 | 1.54 |
| 2013 | 99.51 | 101.24 | 94.81 |
| 2012 | 77.86 | 110.78 | 55.12 |
| 2011 | 113.42 | 300.67 | 51.8 |
| 2010 | 51.91 | 78.11 | 35.21 |
| 2009 | 35.79 | 63.66 | 7.44 |
| 2008 | 10.67 | 18.13 | 5.31 |
| 2007 | 8.65 | 17.77 | 3.46 |
| 2006 | 4.77 | 7.5 | 3.2 |
| 2005 | 2.3 | 5.2 | 1.26 |
| 2004 | 2.89 | 4.3 | 1.82 |