| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.97 | 10.15 | 5.39 |
| 2024 | 11.73 | 21.76 | 6.71 |
| 2023 | 19.24 | 31.85 | 10.97 |
| 2022 | 8.86 | 13.48 | 4.26 |
| 2021 | 13.04 | 29.34 | 5.64 |
| 2020 | 9.79 | 31.57 | 3.18 |
| 2019 | 6.24 | 8.06 | 3.67 |
| 2018 | 6.36 | 11.43 | 4.75 |
| 2017 | 16.13 | 34.8 | 10.26 |
| 2016 | 37.73 | 56.66 | 14.72 |
| 2015 | 24.18 | 38.57 | 14.17 |
| 2014 | 25.42 | 43.04 | 13.06 |
| 2013 | 11.36 | 16.93 | 8.67 |
| 2012 | 10.14 | 12.07 | 7.58 |
| 2011 | 12.29 | 14.69 | 9.59 |
| 2010 | 11.75 | 14.35 | 9.01 |
| 2009 | 11.15 | 16.59 | 6.13 |
| 2008 | 15.37 | 26.04 | 4.57 |
| 2007 | 16.06 | 24.54 | 5.89 |
| 2006 | 4.86 | 6.72 | 2.28 |
| 2005 | 1.42 | 2.7 | 0.6 |
| 2004 | 1.08 | 2.6 | 0.42 |