| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.95 | 8.57 | 4.43 |
| 2024 | 4.45 | 5.9 | 3.42 |
| 2023 | 5.9 | 10.75 | 3.9 |
| 2022 | 6.26 | 9.74 | 4.14 |
| 2021 | 2.8 | 8.05 | 0.76 |
| 2020 | 0.83 | 1.07 | 0.54 |
| 2019 | 1.46 | 3.75 | 0.62 |
| 2018 | 1.81 | 3.15 | 1.09 |
| 2017 | 2.02 | 2.84 | 1.48 |
| 2016 | 3.34 | 7.83 | 1.4 |
| 2015 | 16.17 | 38.86 | 5.33 |
| 2014 | 11.73 | 14.44 | 9.71 |
| 2013 | 26.58 | 87.05 | 12.2 |
| 2012 | 11.48 | 21.12 | 7.78 |
| 2011 | 105.38 | 267.67 | 11.25 |
| 2010 | 112.37 | 257.05 | 53.14 |
| 2009 | 65.57 | 93.22 | 47.48 |
| 2008 | 0 | 0 | |
| 2007 | 17.96 | 26.12 | 10.56 |
| 2006 | 7.14 | 11.89 | 3.66 |
| 2005 | 3.41 | 5.28 | 1.46 |
| 2004 | 766.54 | 766.54 | 766.54 |