| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.59 | 20.47 | 16.53 |
| 2024 | 14.6 | 28.56 | 9.68 |
| 2023 | 20.54 | 27.69 | 15.78 |
| 2022 | 28.18 | 37.59 | 23.11 |
| 2021 | 19.06 | 32.02 | 14.71 |
| 2020 | 16.47 | 21.69 | 12.63 |
| 2019 | 15.98 | 21.54 | 10.87 |
| 2018 | 11.36 | 14.14 | 8.54 |
| 2017 | 13.38 | 15.86 | 11 |
| 2016 | 24.59 | 38.15 | 15.51 |
| 2015 | 30.75 | 59.97 | 15.44 |
| 2014 | 35.27 | 66.02 | 19.44 |
| 2013 | 23.14 | 44.1 | 8.35 |
| 2012 | 8.01 | 11.01 | 5.78 |
| 2011 | 14.75 | 19.82 | 9.56 |
| 2010 | 15.53 | 22.03 | 11.72 |
| 2009 | 10.55 | 14.81 | 5.28 |
| 2008 | 11 | 24.06 | 3.74 |
| 2007 | 11.15 | 18.83 | 5.42 |
| 2006 | 4.38 | 6.43 | 3.41 |
| 2005 | 4.48 | 5.89 | 3.51 |
| 2004 | 6.36 | 11.4 | 4.23 |