| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.82 | 6.24 | 5.44 |
| 2024 | 5.55 | 7.22 | 3.76 |
| 2023 | 5.6 | 6.48 | 4.73 |
| 2022 | 8.07 | 10.2 | 5.72 |
| 2021 | 8.36 | 12.66 | 5.29 |
| 2020 | 8.18 | 11.01 | 5.6 |
| 2019 | 7.06 | 9.35 | 5.19 |
| 2018 | 6.98 | 10.07 | 4.66 |
| 2017 | 12.2 | 16.16 | 8.6 |
| 2016 | 10.9 | 16.69 | 6.63 |
| 2015 | 6.53 | 10.44 | 3.12 |
| 2014 | 2.08 | 3.73 | 1.55 |
| 2013 | 2.1 | 2.66 | 1.75 |
| 2012 | 1.75 | 2.55 | 1.14 |
| 2011 | 1.89 | 2.57 | 1.43 |
| 2010 | 2.65 | 4.16 | 1.92 |
| 2009 | 2.47 | 3.68 | 1.28 |
| 2008 | 1.97 | 3.17 | 1.08 |
| 2007 | 1.4 | 2.07 | 0.69 |
| 2006 | 0.65 | 0.77 | 0.54 |
| 2005 | 0.54 | 0.69 | 0.4 |
| 2004 | 0.71 | 1.35 | 0.45 |