| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.54 | 3.08 | 2.24 |
| 2024 | 2.89 | 4.42 | 1.93 |
| 2023 | 6.82 | 11.15 | 4.3 |
| 2022 | 8.41 | 11.23 | 5.82 |
| 2021 | 16.26 | 27.3 | 9.35 |
| 2020 | 10.81 | 18.47 | 7.5 |
| 2019 | 8.01 | 11.44 | 3.22 |
| 2018 | 2.69 | 3.56 | 2.22 |
| 2017 | 3.07 | 4.02 | 2.19 |
| 2016 | 3.34 | 4.02 | 2.64 |
| 2015 | 4.18 | 7.54 | 2.23 |
| 2014 | 1.53 | 2.39 | 1.06 |
| 2013 | 0.97 | 1.46 | 0.72 |
| 2012 | 1.03 | 1.39 | 0.74 |
| 2011 | 1.45 | 1.83 | 1.08 |
| 2010 | 1.62 | 2.02 | 1.3 |
| 2009 | 0.97 | 1.6 | 0.53 |
| 2008 | 0.82 | 1.39 | 0.34 |
| 2007 | 1.09 | 1.51 | 0.53 |
| 2006 | 0.51 | 0.61 | 0.42 |
| 2005 | 0.42 | 0.53 | 0.29 |
| 2004 | 0.51 | 1 | 0.31 |