| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0.49 | 0.53 | 0.46 |
| 2019 | 0.65 | 1.46 | 0.34 |
| 2018 | 0.58 | 0.83 | 0.24 |
| 2017 | 1.17 | 1.55 | 0.79 |
| 2016 | 1.67 | 2.71 | 1.05 |
| 2015 | 135.86 | 425.89 | 1.59 |
| 2014 | 32.06 | 54.55 | 21.79 |
| 2013 | 55.51 | 64.1 | 44.49 |
| 2012 | 39.97 | 46.39 | 30.79 |
| 2011 | 41.23 | 52.65 | 29.05 |
| 2010 | 25.25 | 42.43 | 17.5 |
| 2009 | 10.75 | 20.14 | 2.69 |
| 2008 | 3.24 | 4.71 | 1.43 |
| 2007 | 3.71 | 6.75 | 1.64 |
| 2006 | 1.34 | 2.07 | 1.06 |
| 2005 | 0.56 | 1.17 | 0.32 |
| 2004 | 0.69 | 1.32 | 0.42 |