| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.86 | 0.91 | 0.82 |
| 2024 | 0.92 | 1.05 | 0.8 |
| 2023 | 1.19 | 1.29 | 1.04 |
| 2022 | 1.36 | 1.71 | 1.19 |
| 2021 | 1.66 | 1.98 | 1.38 |
| 2020 | 1.73 | 1.99 | 1.45 |
| 2019 | 2.31 | 3.27 | 1.83 |
| 2018 | 3.89 | 6.49 | 2.59 |
| 2017 | 9.04 | 15.68 | 5.87 |
| 2016 | 65.59 | 581.44 | 12.84 |
| 2015 | 57.02 | 104.7 | 31.05 |
| 2014 | 19.36 | 33.08 | 8.27 |
| 2013 | 12.09 | 28.62 | 8.64 |
| 2012 | 63.63 | 135.82 | 19.45 |
| 2011 | 151.21 | 212.8 | 97.53 |
| 2010 | 0 | ||
| 2009 | 0 | ||
| 2008 | 38.34 | 97.73 | 18.9 |
| 2007 | 22.81 | 40.07 | 5.28 |
| 2006 | 2.88 | 6.65 | 1.2 |
| 2005 | 1.61 | 2.7 | 0.95 |
| 2004 | 1.62 | 4.17 | 0.78 |