| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.67 | 6.31 | 5.23 |
| 2024 | 5.59 | 7.67 | 4.16 |
| 2023 | 7.24 | 8.83 | 6 |
| 2022 | 6.77 | 10.71 | 5.43 |
| 2021 | 13.49 | 20.25 | 9.08 |
| 2020 | 22.19 | 29.93 | 16.1 |
| 2019 | 11.94 | 18.53 | 8.28 |
| 2018 | 11.35 | 15.8 | 8.41 |
| 2017 | 13.76 | 15.78 | 12.02 |
| 2016 | 13.62 | 16.28 | 11.31 |
| 2015 | 16.44 | 25.84 | 10.8 |
| 2014 | 11.11 | 13.24 | 9.39 |
| 2013 | 10.12 | 12.46 | 6.24 |
| 2012 | 6.82 | 7.84 | 5.45 |
| 2011 | 5.73 | 7.58 | 4.23 |
| 2010 | 4.56 | 5.46 | 3.66 |
| 2009 | 3.53 | 4.92 | 1.63 |
| 2008 | 4.16 | 8.66 | 1.16 |
| 2007 | 6.58 | 8.86 | 3.6 |
| 2006 | 2.68 | 4.52 | 1.48 |
| 2005 | 1.82 | 2.29 | 1.36 |
| 2004 | 3.69 | 6.75 | 1.93 |