| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.99 | 7.35 | 6.11 |
| 2024 | 6.6 | 8.99 | 4.05 |
| 2023 | 8.39 | 11.6 | 5.98 |
| 2022 | 12.35 | 18.24 | 7.44 |
| 2021 | 13.21 | 32.17 | 4.44 |
| 2020 | 4.38 | 6.31 | 3.07 |
| 2019 | 6.97 | 13.24 | 4.76 |
| 2018 | 7.51 | 12.92 | 5.18 |
| 2017 | 14.45 | 17.45 | 11.63 |
| 2016 | 12 | 20.33 | 4.72 |
| 2015 | 3.6 | 8.64 | 1.35 |
| 2014 | 1.08 | 1.57 | 0.67 |
| 2013 | 1.04 | 1.46 | 0.75 |
| 2012 | 1.51 | 1.7 | 1.22 |
| 2011 | 2.18 | 2.7 | 1.21 |
| 2010 | 3.68 | 6.65 | 2.38 |
| 2009 | 3.55 | 6.5 | 0.97 |
| 2008 | 1.35 | 2.37 | 0.68 |
| 2007 | 31.44 | 165.85 | 1.62 |
| 2006 | 64.55 | 129.65 | 7.08 |
| 2005 | 3.74 | 7.75 | 1.08 |
| 2004 | 1.46 | 2.1 | 0.84 |