| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.23 | 3.64 | 2.88 |
| 2024 | 2.95 | 4.04 | 2.18 |
| 2023 | 2.55 | 4.77 | 1.8 |
| 2022 | 1.93 | 2.33 | 1.32 |
| 2021 | 1.53 | 2.08 | 1.3 |
| 2020 | 1.75 | 2.35 | 1.52 |
| 2019 | 2.31 | 3.6 | 1.47 |
| 2018 | 1.39 | 1.86 | 0.92 |
| 2017 | 2.82 | 4.05 | 1.72 |
| 2016 | 3.65 | 4.61 | 2.37 |
| 2015 | 4.18 | 7.12 | 2.55 |
| 2014 | 3.51 | 4.66 | 2.52 |
| 2013 | 2.61 | 3.93 | 1.4 |
| 2012 | 1.7 | 2.49 | 1.25 |
| 2011 | 2.65 | 3.45 | 1.8 |
| 2010 | 4.24 | 6.96 | 2.95 |
| 2009 | 4.31 | 6.68 | 2.14 |
| 2008 | 4.7 | 9.94 | 1.5 |
| 2007 | 6.55 | 10.66 | 3.82 |
| 2006 | 4.82 | 6.26 | 3.38 |
| 2005 | 4.77 | 12.13 | 0.24 |
| 2004 | 0.64 | 1.03 | 0.37 |