| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.12 | 7.74 | 4.95 |
| 2024 | 4.8 | 6.02 | 3.54 |
| 2023 | 11.01 | 22.25 | 5.46 |
| 2022 | 27.55 | 55.95 | 19.09 |
| 2021 | 27.64 | 46.59 | 13.58 |
| 2020 | 11.02 | 16.62 | 6.96 |
| 2019 | 9.07 | 13.87 | 4.06 |
| 2018 | 2.94 | 4.84 | 1.79 |
| 2017 | 3.24 | 5.35 | 1.85 |
| 2016 | 1.21 | 2.26 | 0.83 |
| 2015 | 0.62 | 1.24 | 0.35 |
| 2014 | 0.43 | 0.54 | 0.36 |
| 2013 | 0.42 | 0.5 | 0.33 |
| 2012 | 0.41 | 0.52 | 0.29 |
| 2011 | 0.74 | 1.14 | 0.41 |
| 2010 | 1.38 | 5.08 | 0.53 |
| 2009 | 3.12 | 4.83 | 1.26 |
| 2008 | 1.33 | 2.03 | 0.83 |
| 2007 | 1.48 | 2.12 | 0.9 |
| 2006 | 1.17 | 1.65 | 0.83 |
| 2005 | 0.98 | 1.27 | 0.68 |
| 2004 | 1.49 | 2.48 | 0.92 |