| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.41 | 9.15 | 5.22 |
| 2024 | 6.5 | 9.16 | 3.98 |
| 2023 | 14.46 | 23.13 | 7.19 |
| 2022 | 14.26 | 23.08 | 8.41 |
| 2021 | 7.89 | 10.98 | 5.51 |
| 2020 | 6.1 | 8.24 | 5.07 |
| 2019 | 9.05 | 13.1 | 7.27 |
| 2018 | 11.37 | 19.63 | 6.28 |
| 2017 | 19.17 | 25.84 | 13.75 |
| 2016 | 19.94 | 26.94 | 10.8 |
| 2015 | 9.9 | 17.63 | 5.65 |
| 2014 | 3.72 | 8.56 | 1.99 |
| 2013 | 2.26 | 2.8 | 1.89 |
| 2012 | 2.96 | 4.14 | 2.1 |
| 2011 | 5.63 | 7.74 | 3.28 |
| 2010 | 4.43 | 5.74 | 3.26 |
| 2009 | 3.14 | 4.59 | 1.37 |
| 2008 | 2.2 | 4.49 | 1.01 |
| 2007 | 2.98 | 5.31 | 1.29 |
| 2006 | 1.24 | 1.59 | 0.9 |
| 2005 | 1.13 | 1.35 | 0.84 |
| 2004 | 1.58 | 2.89 | 0.98 |