| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 25.45 | 31.21 | 16.98 |
| 2023 | 23.32 | 32.86 | 17.7 |
| 2022 | 28.72 | 39.09 | 19.45 |
| 2021 | 13.93 | 25.97 | 9.08 |
| 2020 | 12.14 | 17.55 | 6.18 |
| 2019 | 2.93 | 6.94 | 1.43 |
| 2018 | 2.8 | 5.39 | 1.43 |
| 2017 | 4.26 | 5.87 | 3.34 |
| 2016 | 3.4 | 5.43 | 2.46 |
| 2015 | 2.55 | 3.87 | 1.94 |
| 2014 | 1.26 | 1.84 | 0.91 |
| 2013 | 1.03 | 1.14 | 0.88 |
| 2012 | 1.01 | 1.61 | 0.81 |
| 2011 | 1.72 | 2.36 | 1.17 |
| 2010 | 3.01 | 4.05 | 2.12 |
| 2009 | 2.82 | 4.14 | 1.24 |
| 2008 | 2.65 | 8.12 | 0.92 |
| 2007 | 20.85 | 51.68 | 5.33 |
| 2006 | 6.22 | 26.28 | 0.89 |
| 2005 | 0.71 | 0.96 | 0.45 |
| 2004 | 0.71 | 1.31 | 0.49 |