| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.2 | 20.54 | 12.05 |
| 2024 | 5.07 | 10.26 | 3.26 |
| 2023 | 5.18 | 6.5 | 4.18 |
| 2022 | 6.25 | 8.63 | 4.18 |
| 2021 | 4.55 | 6.65 | 3.31 |
| 2020 | 3.46 | 6.13 | 2.39 |
| 2019 | 3.01 | 4.33 | 2.4 |
| 2018 | 2.5 | 3.33 | 1.89 |
| 2017 | 2.65 | 3.68 | 1.56 |
| 2016 | 1.49 | 2.06 | 1.22 |
| 2015 | 2.1 | 4.09 | 1.33 |
| 2014 | 1.22 | 1.94 | 0.86 |
| 2013 | 1.4 | 1.93 | 1.05 |
| 2012 | 4 | 11.39 | 1.43 |
| 2011 | 6.05 | 7.53 | 4.42 |
| 2010 | 6.2 | 8.09 | 4.15 |
| 2009 | 4.2 | 7.26 | 1.48 |
| 2008 | 2.54 | 5.79 | 0.86 |
| 2007 | 2.8 | 4.69 | 1.13 |
| 2006 | 1.31 | 1.88 | 0.98 |
| 2005 | 1.19 | 1.54 | 1.02 |
| 2004 | 2.11 | 3.1 | 1.47 |
| 2003 | 2.53 | 3.08 | 2.25 |