| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.37 | 8.02 | 1.56 |
| 2024 | 1.69 | 2.48 | 1.09 |
| 2023 | 1.34 | 2.86 | 1.01 |
| 2022 | 1.27 | 1.67 | 1.07 |
| 2021 | 2.36 | 4.8 | 1.29 |
| 2020 | 4.47 | 5.34 | 3.47 |
| 2019 | 7.09 | 8.82 | 5.74 |
| 2018 | 3.24 | 7.63 | 0.66 |
| 2017 | 2.32 | 2.7 | 2.01 |
| 2016 | 3.73 | 5.37 | 2.58 |
| 2015 | 5.11 | 9.18 | 3.07 |
| 2014 | 2.89 | 3.81 | 2.36 |
| 2013 | 2.41 | 3.66 | 1.78 |
| 2012 | 2.07 | 2.77 | 1.52 |
| 2011 | 3.56 | 5.34 | 2.3 |
| 2010 | 4.26 | 5.53 | 3.28 |
| 2009 | 3.37 | 4.27 | 2.14 |
| 2008 | 3.07 | 5.62 | 1.65 |
| 2007 | 4.14 | 6.07 | 2.98 |
| 2006 | 2.5 | 3.7 | 1.7 |
| 2005 | 1.85 | 3.03 | 1.27 |
| 2004 | 2.81 | 3.54 | 1.36 |
| 2003 | 2.7 | 3.08 | 2.37 |
| 2002 | 3.25 | 4.05 | 2.28 |
| 2001 | 5.23 | 7.39 | 3.54 |