| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 21.76 | 28.97 | 15.06 |
| 2024 | 21.67 | 44.36 | 11.9 |
| 2023 | 29.05 | 45.03 | 19.91 |
| 2022 | 34.13 | 62.42 | 17.44 |
| 2021 | 13.89 | 24.56 | 8.39 |
| 2020 | 6.81 | 11.04 | 4.2 |
| 2019 | 6.3 | 10.99 | 4.15 |
| 2018 | 6.7 | 10.03 | 4.02 |
| 2017 | 17.98 | 54.81 | 6.78 |
| 2016 | 18.95 | 49.81 | 7.89 |
| 2015 | 10.71 | 18.6 | 4.88 |
| 2014 | 4.98 | 7.29 | 3.25 |
| 2013 | 3.68 | 4.2 | 3.03 |
| 2012 | 3.04 | 3.74 | 2.3 |
| 2011 | 5.69 | 9.59 | 3.18 |
| 2010 | 6.8 | 9.95 | 4.94 |
| 2009 | 5.04 | 9.22 | 3.1 |
| 2008 | 3.61 | 4.9 | 2.26 |
| 2007 | 3.92 | 5.89 | 1.95 |
| 2006 | 1.8 | 2.19 | 1.2 |
| 2005 | 1.49 | 1.98 | 1.08 |
| 2004 | 1.91 | 2.57 | 1.36 |