| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.04 | 3.75 | 2.57 |
| 2024 | 2.68 | 4.57 | 1.94 |
| 2023 | 4.39 | 10.1 | 1.98 |
| 2022 | 7.06 | 10.17 | 4.01 |
| 2021 | 4.01 | 7.19 | 1.72 |
| 2020 | 1.98 | 3.23 | 0.91 |
| 2019 | 1.04 | 1.51 | 0.81 |
| 2018 | 1.32 | 2.18 | 0.82 |
| 2017 | 1.79 | 1.98 | 1.4 |
| 2016 | 1.42 | 1.84 | 1.14 |
| 2015 | 2.01 | 3.28 | 1.35 |
| 2014 | 1.15 | 1.54 | 0.89 |
| 2013 | 1.46 | 2.14 | 1.12 |
| 2012 | 1.8 | 2.4 | 1.47 |
| 2011 | 2.79 | 4.53 | 1.49 |
| 2010 | 4.23 | 5.98 | 3.17 |
| 2009 | 11.04 | 24.59 | 4.8 |
| 2008 | 9.64 | 22.87 | 4.2 |
| 2007 | 5.04 | 16.71 | 3.27 |
| 2006 | 2.11 | 3.27 | 1.31 |
| 2005 | 1.71 | 2.43 | 1.24 |
| 2004 | 2.39 | 3.21 | 1.77 |
| 2003 | 3.31 | 4.14 | 2.37 |
| 2002 | 5.74 | 12.04 | 2.82 |
| 2001 | 10.96 | 12.81 | 8.57 |
| 2000 | 7.87 | 11.08 | 5.09 |