| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.25 | 4.59 | 3.81 |
| 2024 | 2.95 | 6.14 | 1.72 |
| 2023 | 5.68 | 8.34 | 2.94 |
| 2022 | 4.3 | 5.87 | 2.6 |
| 2021 | 1.9 | 3.22 | 1.34 |
| 2020 | 1.35 | 1.76 | 1.12 |
| 2019 | 1.44 | 1.8 | 1.21 |
| 2018 | 1.67 | 2.16 | 1.22 |
| 2017 | 3.07 | 4.58 | 1.67 |
| 2016 | 4.89 | 7.43 | 4.14 |
| 2015 | 7.77 | 13.18 | 4.65 |
| 2014 | 5.61 | 7.58 | 4.19 |
| 2013 | 4.35 | 5.96 | 3.45 |
| 2012 | 3.83 | 4.64 | 2.8 |
| 2011 | 3.63 | 4.68 | 2.97 |
| 2010 | 3.66 | 4.57 | 2.65 |
| 2009 | 2.48 | 3.26 | 0.95 |
| 2008 | 1.68 | 3.18 | 0.77 |
| 2007 | 2.59 | 4.18 | 1.54 |
| 2006 | 0.76 | 1.56 | 0.4 |
| 2005 | 0.51 | 0.68 | 0.35 |
| 2004 | 0.47 | 0.66 | 0.32 |