| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.96 | 2.16 | 1.69 |
| 2024 | 1.8 | 2.42 | 1.24 |
| 2023 | 2.45 | 3.96 | 1.72 |
| 2022 | 2.24 | 4.78 | 1.17 |
| 2021 | 1.84 | 2.79 | 1.46 |
| 2020 | 1.72 | 2.31 | 1.45 |
| 2019 | 1.84 | 2.47 | 1.42 |
| 2018 | 1.67 | 2.92 | 1.04 |
| 2017 | 5.8 | 11.27 | 2.62 |
| 2016 | 4.49 | 6.38 | 2.66 |
| 2015 | 2.73 | 5.66 | 1.16 |
| 2014 | 0.96 | 1.62 | 0.49 |
| 2013 | 0.5 | 0.58 | 0.4 |
| 2012 | 0.47 | 0.67 | 0.34 |
| 2011 | 0.7 | 0.97 | 0.38 |
| 2010 | 0.84 | 1.07 | 0.62 |
| 2009 | 0.68 | 1.03 | 0.35 |
| 2008 | 0.6 | 1.22 | 0.24 |
| 2007 | 0.9 | 1.34 | 0.4 |
| 2006 | 0.4 | 0.46 | 0.34 |
| 2005 | 0.46 | 0.69 | 0.35 |
| 2004 | 0.74 | 1.22 | 0.45 |