| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.54 | 12.26 | 1.63 |
| 2024 | 1.74 | 2.43 | 1.13 |
| 2023 | 3.01 | 4.43 | 1.96 |
| 2022 | 2.55 | 4.29 | 1.35 |
| 2021 | 1.78 | 2.27 | 1.22 |
| 2020 | 1.23 | 2.02 | 0.87 |
| 2019 | 1.16 | 1.42 | 0.91 |
| 2018 | 1.17 | 1.64 | 0.81 |
| 2017 | 2.11 | 2.93 | 1.49 |
| 2016 | 2.98 | 3.95 | 2.12 |
| 2015 | 4.59 | 9.25 | 1.93 |
| 2014 | 4.85 | 6.61 | 3.82 |
| 2013 | 4.1 | 5.98 | 2.71 |
| 2012 | 7.93 | 24.38 | 2.17 |
| 2011 | 19.23 | 29.32 | 10.87 |
| 2010 | 14.18 | 22.37 | 8.33 |
| 2009 | 4.45 | 12.3 | 1.74 |
| 2008 | 3.02 | 5.93 | 1.53 |
| 2007 | 3.32 | 5.19 | 1.53 |
| 2006 | 1.52 | 1.77 | 1.25 |
| 2005 | 1.64 | 2.14 | 1.22 |
| 2004 | 2.45 | 3.65 | 1.89 |