| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.91 | 6.08 | 1.64 |
| 2024 | 2.61 | 5.75 | 1.38 |
| 2023 | 5.76 | 6.84 | 4.99 |
| 2022 | 5.51 | 8.37 | 4.31 |
| 2021 | 4.49 | 5.41 | 3.71 |
| 2020 | 6.57 | 8.39 | 5.06 |
| 2019 | 7.73 | 10.66 | 6.18 |
| 2018 | 4.98 | 9.85 | 2.07 |
| 2017 | 13.5 | 27.12 | 3.15 |
| 2016 | 22.37 | 31.78 | 19.41 |
| 2015 | 27.9 | 52.76 | 17.74 |
| 2014 | 12.49 | 20.7 | 9.52 |
| 2013 | 10.31 | 16.83 | 7.88 |
| 2012 | 7.67 | 9.87 | 5.09 |
| 2011 | 9.58 | 16.69 | 5.19 |
| 2010 | 17.69 | 25.27 | 13.27 |
| 2009 | 17.93 | 27.44 | 8.29 |
| 2008 | 12.25 | 20.36 | 6.43 |
| 2007 | 19.61 | 36.35 | 12.78 |
| 2006 | 9.04 | 15.15 | 2.75 |
| 2005 | 2.64 | 3.29 | 2 |
| 2004 | 3.99 | 7.68 | 2.64 |