| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 8.91 | 9.8 | 8.13 |
| 2024 | 7.69 | 11.89 | 6.11 |
| 2023 | 7.92 | 9.71 | 6.43 |
| 2022 | 8.71 | 16.17 | 5.97 |
| 2021 | 12.86 | 19.38 | 5.66 |
| 2020 | 17.76 | 39.86 | 7 |
| 2019 | 35.69 | 64.85 | 5.95 |
| 2018 | 8.2 | 21.04 | 2.85 |
| 2017 | 14.54 | 23.46 | 8.99 |
| 2016 | 40.1 | 158.08 | 9.17 |
| 2015 | 86.36 | 190.31 | 22.09 |
| 2014 | 16.96 | 26.21 | 12.48 |
| 2013 | 17.57 | 25.67 | 11.18 |
| 2012 | 7.07 | 12.27 | 5.27 |
| 2011 | 7.04 | 9.26 | 4.91 |
| 2010 | 12.88 | 18.37 | 7.99 |
| 2009 | 8.74 | 18.74 | 2.11 |
| 2008 | 2.8 | 5.52 | 1.19 |
| 2007 | 4.18 | 7.31 | 1.67 |
| 2006 | 1.79 | 2.37 | 1.27 |
| 2005 | 1.1 | 2.18 | 0.66 |
| 2004 | 1.09 | 1.86 | 0.7 |