| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 311.37 | 617.42 | 7.39 |
| 2021 | 123.61 | 797.39 | 0.11 |
| 2020 | 0.59 | 1.13 | 0.22 |
| 2019 | 0.8 | 1.21 | 0.61 |
| 2018 | 1.18 | 2.1 | 0.73 |
| 2017 | 1.83 | 2.63 | 1.13 |
| 2016 | 2.58 | 4.08 | 0.95 |
| 2015 | 1.14 | 1.51 | 0.73 |
| 2014 | 0.49 | 0.88 | 0.36 |
| 2013 | 0.47 | 0.79 | 0.35 |
| 2012 | 1.71 | 4.15 | 0.36 |
| 2011 | 4.99 | 6.05 | 3.3 |
| 2010 | 6.69 | 9.02 | 4.76 |
| 2009 | 6.18 | 8.86 | 3.41 |
| 2008 | 8.37 | 21.65 | 2.24 |
| 2007 | 8.24 | 16.8 | 3.16 |
| 2006 | 1.78 | 3.21 | 0.84 |
| 2005 | 0.84 | 1.03 | 0.62 |
| 2004 | 1.43 | 2.44 | 0.77 |