| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.24 | 3.09 | 1.62 |
| 2024 | 1.09 | 2.32 | 0.6 |
| 2023 | 0.93 | 2.92 | 0.26 |
| 2022 | 2.67 | 3.08 | 2.1 |
| 2021 | 2.11 | 3.76 | 0.97 |
| 2020 | 2.09 | 4 | 1.23 |
| 2019 | 0 | 0 | |
| 2018 | 1.81 | 2.93 | 0.8 |
| 2017 | 28.23 | 96.13 | 2.86 |
| 2016 | 122.26 | 301.2 | 28.47 |
| 2015 | 35.88 | 80.79 | 22.73 |
| 2014 | 24.83 | 40.66 | 18.32 |
| 2013 | 18.76 | 22.79 | 11.24 |
| 2012 | 10.11 | 12.75 | 7.99 |
| 2011 | 12.93 | 20.1 | 8.71 |
| 2010 | 18.39 | 24.47 | 13.81 |
| 2009 | 12.55 | 20.03 | 7.31 |
| 2008 | 8.31 | 15.15 | 5.13 |
| 2007 | 8.83 | 13.82 | 3.74 |
| 2006 | 2.07 | 4.37 | 0.99 |
| 2005 | 0.22 | 1.04 | 0.03 |
| 2004 | 0.05 | 0.08 | 0.03 |