| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.54 | 6.57 | 4.92 |
| 2024 | 4.52 | 6.85 | 3.32 |
| 2023 | 4.18 | 4.87 | 3.51 |
| 2022 | 3.96 | 5.59 | 3.01 |
| 2021 | 3.79 | 6.07 | 2.72 |
| 2020 | 20.83 | 63.75 | 3.17 |
| 2019 | 33.45 | 54.01 | 27.99 |
| 2018 | 36.41 | 47.09 | 27.51 |
| 2017 | 38.91 | 53.06 | 25.94 |
| 2016 | 20.28 | 30.35 | 8.93 |
| 2015 | 9.35 | 16.33 | 3.53 |
| 2014 | 3.14 | 4.45 | 1.98 |
| 2013 | 2.03 | 2.66 | 1.35 |
| 2012 | 1.55 | 1.91 | 1.26 |
| 2011 | 2.17 | 3.37 | 1.43 |
| 2010 | 2.08 | 2.61 | 1.68 |
| 2009 | 1.37 | 2.11 | 0.58 |
| 2008 | 0.94 | 2.08 | 0.39 |
| 2007 | 2.05 | 3.7 | 1.26 |
| 2006 | 1.65 | 2.5 | 1.01 |
| 2005 | 3.97 | 11.43 | 1.9 |
| 2004 | 2.68 | 3.48 | 2.14 |