| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.44 | 6.54 | 4.55 |
| 2024 | 4.03 | 7.46 | 2.91 |
| 2023 | 4.41 | 6.85 | 3.12 |
| 2022 | 3.22 | 4.25 | 2.62 |
| 2021 | 4.04 | 6.09 | 2.88 |
| 2020 | 2.34 | 3.84 | 1.48 |
| 2019 | 2.63 | 3.21 | 1.97 |
| 2018 | 4.29 | 6.36 | 1.96 |
| 2017 | 5.09 | 5.86 | 4.5 |
| 2016 | 4.87 | 7.03 | 4.07 |
| 2015 | 7.43 | 13.91 | 4.07 |
| 2014 | 4.58 | 6.98 | 3.4 |
| 2013 | 7.63 | 10.22 | 5.8 |
| 2012 | 6.45 | 7.96 | 5.03 |
| 2011 | 5.81 | 6.57 | 4.89 |
| 2010 | 5.66 | 7.21 | 4.18 |
| 2009 | 3.44 | 5.63 | 1.53 |
| 2008 | 3.18 | 6.29 | 1.13 |
| 2007 | 4.06 | 5.08 | 2.35 |
| 2006 | 2.17 | 2.87 | 1.72 |
| 2005 | 1.95 | 2.51 | 1.57 |
| 2004 | 2 | 2.44 | 1.52 |
| 2003 | 2.69 | 3.41 | 1.72 |
| 2002 | 3.78 | 4.24 | 3.25 |
| 2001 | 5.16 | 6.29 | 3.72 |