| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.31 | 2.71 | 2.05 |
| 2024 | 1.93 | 2.84 | 1.37 |
| 2023 | 3.71 | 7.33 | 2.05 |
| 2022 | 8.72 | 20.18 | 4.88 |
| 2021 | 29.95 | 71.16 | 4.79 |
| 2020 | 2.02 | 5.84 | 0.79 |
| 2019 | 0.79 | 0.96 | 0.61 |
| 2018 | 1.05 | 1.72 | 0.53 |
| 2017 | 2.08 | 2.99 | 1.66 |
| 2016 | 2.12 | 2.56 | 1.5 |
| 2015 | 2.03 | 2.65 | 1.13 |
| 2014 | 1.01 | 1.46 | 0.68 |
| 2013 | 0.78 | 0.96 | 0.67 |
| 2012 | 0.83 | 1.07 | 0.65 |
| 2011 | 1.12 | 1.44 | 0.69 |
| 2010 | 1.17 | 1.51 | 0.9 |
| 2009 | 0.9 | 1.2 | 0.52 |
| 2008 | 0.95 | 1.97 | 0.41 |
| 2007 | 1.47 | 2.1 | 1.07 |
| 2006 | 1.26 | 1.63 | 0.95 |
| 2005 | 1.35 | 1.65 | 0.92 |
| 2004 | 1.91 | 3.92 | 1.06 |