| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.76 | 1.87 | 1.68 |
| 2024 | 1.62 | 1.93 | 1.37 |
| 2023 | 1.91 | 2.25 | 1.52 |
| 2022 | 2.51 | 3.46 | 1.83 |
| 2021 | 4.44 | 7.53 | 2.66 |
| 2020 | 3.28 | 4.61 | 2.38 |
| 2019 | 3.1 | 4.04 | 2.27 |
| 2018 | 4.92 | 11.34 | 2.21 |
| 2017 | 4.25 | 5.4 | 3.09 |
| 2016 | 10.68 | 46.68 | 3.69 |
| 2015 | 8.65 | 18.97 | 3.09 |
| 2014 | 3.26 | 4.46 | 2.67 |
| 2013 | 2.7 | 3.29 | 2.17 |
| 2012 | 4.11 | 7.75 | 2.53 |
| 2011 | 7.28 | 8.77 | 5.96 |
| 2010 | 6.27 | 8.51 | 4.41 |
| 2009 | 3.96 | 6.24 | 1.81 |
| 2008 | 2.65 | 5.12 | 1.37 |
| 2007 | 3.17 | 5.09 | 1.33 |
| 2006 | 1.44 | 1.97 | 1.25 |
| 2005 | 1.34 | 1.71 | 0.99 |
| 2004 | 2.12 | 2.8 | 1.66 |
| 2003 | 2.8 | 3.47 | 2.09 |
| 2002 | 6.9 | 13.67 | 4.41 |