| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.58 | 22.13 | 12.53 |
| 2024 | 10.34 | 14.88 | 7.11 |
| 2023 | 12.63 | 16.52 | 9.91 |
| 2022 | 9.86 | 13.22 | 6.22 |
| 2021 | 4.84 | 12.78 | 3.65 |
| 2020 | 5.38 | 7.73 | 3.79 |
| 2019 | 6.95 | 9.34 | 5.09 |
| 2018 | 9.41 | 12.97 | 7.11 |
| 2017 | 17.35 | 28.1 | 10.84 |
| 2016 | 12.24 | 15.28 | 8.97 |
| 2015 | 15.11 | 26.01 | 9.54 |
| 2014 | 7.89 | 13.33 | 4.28 |
| 2013 | 4.86 | 6.07 | 4.4 |
| 2012 | 3.29 | 3.77 | 2.63 |
| 2011 | 4.04 | 4.9 | 2.54 |
| 2010 | 4.61 | 5.78 | 3.85 |
| 2009 | 2.76 | 4.67 | 1.38 |
| 2008 | 2.91 | 5.77 | 1.16 |
| 2007 | 3.98 | 6.36 | 1.54 |
| 2006 | 1.58 | 2.11 | 1.08 |
| 2005 | 0.88 | 1.13 | 0.69 |
| 2004 | 0.99 | 1.44 | 0.76 |