| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 5.3 | 8.9 | 3.61 |
| 2023 | 9.55 | 13.74 | 5.8 |
| 2022 | 11.74 | 14.33 | 9.24 |
| 2021 | 10.64 | 18.83 | 4.68 |
| 2020 | 7.3 | 14.61 | 4.15 |
| 2019 | 0 | 0 | |
| 2018 | 4.68 | 6.57 | 1.53 |
| 2017 | 83.05 | 300.93 | 6.21 |
| 2016 | 427.52 | 1080.93 | 65.56 |
| 2015 | 111.49 | 233.63 | 54.91 |
| 2014 | 109.91 | 132.06 | 86.21 |
| 2013 | 79.16 | 119.16 | 47.88 |
| 2012 | 45.08 | 53.12 | 36.35 |
| 2011 | 60.65 | 92.8 | 40.58 |
| 2010 | 78.07 | 107.32 | 59.36 |
| 2009 | 58.64 | 82.59 | 31.85 |
| 2008 | 25.71 | 34.49 | 17.31 |
| 2007 | 21.67 | 30.42 | 12.69 |
| 2006 | 7.34 | 12.69 | 2.83 |
| 2005 | 2.28 | 4.28 | 1.04 |
| 2004 | 1.97 | 3.33 | 1.22 |