| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.19 | 8.97 | 7.44 |
| 2024 | 7.24 | 11.24 | 4.75 |
| 2023 | 9.57 | 12.71 | 7.61 |
| 2022 | 12.65 | 20.42 | 7.9 |
| 2021 | 29.07 | 44.4 | 19.75 |
| 2020 | 14.81 | 30.43 | 6.08 |
| 2019 | 7.04 | 10.15 | 4.66 |
| 2018 | 7.65 | 11.86 | 4.4 |
| 2017 | 11.14 | 14.07 | 8.08 |
| 2016 | 10.52 | 13.83 | 7.41 |
| 2015 | 12.24 | 14.57 | 9.36 |
| 2014 | 7.39 | 10.68 | 5.13 |
| 2013 | 5.43 | 7.76 | 3.93 |
| 2012 | 10.08 | 14.53 | 4.98 |
| 2011 | 9.85 | 15.08 | 8.19 |
| 2010 | 12.18 | 17.14 | 7.58 |
| 2009 | 10.28 | 15.48 | 6.28 |
| 2008 | 17.82 | 57 | 4.42 |
| 2007 | 36.12 | 55.02 | 16.65 |
| 2006 | 7.7 | 16.65 | 1.69 |
| 2005 | 1.9 | 2.68 | 1.41 |
| 2004 | 2.38 | 3.28 | 1.47 |