| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.27 | 3.7 | 2.81 |
| 2024 | 2.45 | 3.96 | 1.91 |
| 2023 | 2.9 | 3.94 | 2.41 |
| 2022 | 2.36 | 2.93 | 1.95 |
| 2021 | 34.41 | 195.87 | 0.51 |
| 2020 | 0.67 | 1.04 | 0.53 |
| 2019 | 0.64 | 0.78 | 0.56 |
| 2018 | 0.8 | 1.15 | 0.56 |
| 2017 | 1.39 | 1.96 | 1.06 |
| 2016 | 1.36 | 1.65 | 0.99 |
| 2015 | 1.28 | 2.07 | 0.69 |
| 2014 | 1.23 | 3.01 | 0.96 |
| 2013 | 0.98 | 1.18 | 0.85 |
| 2012 | 0.88 | 0.98 | 0.79 |
| 2011 | 1.16 | 1.43 | 0.8 |
| 2010 | 1.54 | 1.89 | 1.3 |
| 2009 | 1.28 | 1.72 | 0.84 |
| 2008 | 1.45 | 2.4 | 0.71 |
| 2007 | 2.32 | 3.51 | 1.33 |
| 2006 | 1.23 | 1.68 | 0.84 |
| 2005 | 0.72 | 0.89 | 0.48 |
| 2004 | 0.73 | 1.2 | 0.46 |