| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.85 | 16.35 | 12 |
| 2024 | 11.45 | 19.65 | 8.44 |
| 2023 | 10.52 | 13.58 | 8.72 |
| 2022 | 10.78 | 17.71 | 8.05 |
| 2021 | 8.79 | 18.48 | 6.81 |
| 2020 | 10.19 | 15.76 | 5.28 |
| 2019 | 7.17 | 9.44 | 5.21 |
| 2018 | 8.19 | 10.28 | 4.68 |
| 2017 | 8.24 | 10.57 | 6.34 |
| 2016 | 5.49 | 8.3 | 4.14 |
| 2015 | 5.21 | 9.05 | 2.08 |
| 2014 | 1.91 | 2.23 | 1.59 |
| 2013 | 2.45 | 3.14 | 1.93 |
| 2012 | 2.16 | 2.63 | 1.69 |
| 2011 | 4.43 | 8.29 | 1.79 |
| 2010 | 3.45 | 4.79 | 2.37 |
| 2009 | 3.37 | 4.54 | 1.97 |
| 2008 | 3.06 | 6.5 | 1.16 |
| 2007 | 4.19 | 6.12 | 2.03 |
| 2006 | 1.86 | 2.99 | 1.06 |
| 2005 | 0.95 | 1.31 | 0.6 |
| 2004 | 1.33 | 2.32 | 0.88 |