| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.4 | 5.53 | 1.85 |
| 2024 | 2 | 3.51 | 1.09 |
| 2023 | 2.38 | 4.07 | 1.27 |
| 2022 | 1.73 | 2.43 | 1.38 |
| 2021 | 2.29 | 4.49 | 0.88 |
| 2020 | 0.96 | 1.87 | 0.56 |
| 2019 | 1.36 | 1.61 | 1.1 |
| 2018 | 5.8 | 17.62 | 1.1 |
| 2017 | 93.21 | 163.53 | 14.34 |
| 2016 | 212.52 | 428.78 | 111.62 |
| 2015 | 373.95 | 715.92 | 182.36 |
| 2014 | 185.37 | 376.91 | 72.05 |
| 2013 | 110.08 | 166.14 | 60.92 |
| 2012 | 438.45 | 762.46 | 121.07 |
| 2011 | 340.52 | 862.47 | 104.41 |
| 2010 | 176.48 | 388.52 | 90.06 |
| 2009 | 49.41 | 114.18 | 14.26 |
| 2008 | 15.98 | 27.55 | 8.37 |
| 2007 | 19.65 | 29.54 | 9.47 |
| 2006 | 19.88 | 51.52 | 9 |
| 2005 | 11.52 | 32.82 | 2.68 |
| 2004 | 4.48 | 8.36 | 2.32 |