| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.37 | 3.58 | 3.14 |
| 2024 | 3.75 | 4.56 | 3.01 |
| 2023 | 5.81 | 8.43 | 4.28 |
| 2022 | 5.7 | 7.09 | 4.67 |
| 2021 | 6.32 | 9.68 | 5.03 |
| 2020 | 3.72 | 8.76 | 2.36 |
| 2019 | 3.69 | 5.22 | 3.04 |
| 2018 | 5.99 | 8.64 | 3.11 |
| 2017 | 6.46 | 10.51 | 5.94 |
| 2016 | 8.28 | 13.44 | 5.27 |
| 2015 | 12.21 | 19.91 | 9.12 |
| 2014 | 5.58 | 10.81 | 4.37 |
| 2013 | 6.81 | 10.84 | 4.71 |
| 2012 | 7.92 | 9.74 | 5.84 |
| 2011 | 9.72 | 12.56 | 6.25 |
| 2010 | 10.76 | 15.82 | 7.84 |
| 2009 | 6.2 | 9.69 | 3.24 |
| 2008 | 5.41 | 10.34 | 1.88 |
| 2007 | 5.13 | 9.61 | 1.9 |
| 2006 | 2.01 | 2.81 | 1.57 |
| 2005 | 1.69 | 2.09 | 1.29 |
| 2004 | 2.62 | 3.39 | 2.03 |
| 2003 | 3.85 | 9.42 | 2.38 |