| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 29.56 | 33.69 | 27.36 |
| 2024 | 23.12 | 32.06 | 12.19 |
| 2023 | 14.3 | 17.13 | 12.24 |
| 2022 | 16.41 | 21.79 | 14.15 |
| 2021 | 22.03 | 28.33 | 18.17 |
| 2020 | 22.66 | 37.09 | 14.4 |
| 2019 | 25.48 | 36 | 18.37 |
| 2018 | 35.58 | 49.7 | 24.57 |
| 2017 | 57.03 | 85.13 | 43.71 |
| 2016 | 52.5 | 58.3 | 43.15 |
| 2015 | 65.24 | 92.93 | 41.1 |
| 2014 | 40.19 | 77.63 | 30.89 |
| 2013 | 27.28 | 43.87 | 19.54 |
| 2012 | 22.55 | 25.98 | 19.88 |
| 2011 | 21.41 | 26.39 | 17.82 |
| 2010 | 22.39 | 28.91 | 17.88 |
| 2009 | 22.06 | 29.18 | 12.85 |
| 2008 | 17.3 | 31.25 | 9.52 |
| 2007 | 27.9 | 36.44 | 16.03 |
| 2006 | 16.13 | 22.3 | 13.01 |
| 2005 | 19.78 | 28.22 | 13.94 |
| 2004 | 17.12 | 26.68 | 12.51 |