| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.18 | 23.5 | 11.85 |
| 2024 | 6.96 | 11.35 | 3.99 |
| 2023 | 5.78 | 8.49 | 3.76 |
| 2022 | 8.84 | 13.61 | 7.24 |
| 2021 | 7.51 | 10.19 | 5.45 |
| 2020 | 7.62 | 12.87 | 5.86 |
| 2019 | 15.48 | 21.06 | 11.39 |
| 2018 | 15.33 | 22.15 | 11.03 |
| 2017 | 18.99 | 21.74 | 15.88 |
| 2016 | 24.01 | 29.88 | 17.69 |
| 2015 | 20.07 | 39.45 | 9.22 |
| 2014 | 7.48 | 10.88 | 6.26 |
| 2013 | 6.84 | 8.62 | 5.66 |
| 2012 | 6.28 | 7.99 | 5.07 |
| 2011 | 9.18 | 11.24 | 5.88 |
| 2010 | 9.23 | 11.43 | 7.42 |
| 2009 | 7.54 | 11.38 | 2.84 |
| 2008 | 3.63 | 5.03 | 2.32 |
| 2007 | 4.15 | 6.14 | 2.86 |
| 2006 | 3.23 | 4.3 | 1.45 |
| 2005 | 1.8 | 2.69 | 1.29 |
| 2004 | 2.44 | 3.93 | 1.69 |