| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.53 | 3.98 | 1.34 |
| 2024 | 2.2 | 3.75 | 1.38 |
| 2023 | 2.11 | 2.68 | 1.7 |
| 2022 | 1.82 | 2.31 | 1.49 |
| 2021 | 1.53 | 2.79 | 1.02 |
| 2020 | 1.07 | 1.37 | 0.81 |
| 2019 | 1.28 | 1.72 | 1 |
| 2018 | 1.36 | 1.84 | 0.92 |
| 2017 | 2.26 | 3.18 | 1.68 |
| 2016 | 3.51 | 7.18 | 2.1 |
| 2015 | 3.88 | 8.29 | 2.46 |
| 2014 | 2.35 | 3.32 | 1.81 |
| 2013 | 1.91 | 2.38 | 1.63 |
| 2012 | 1.8 | 2.23 | 1.47 |
| 2011 | 2.86 | 4.24 | 1.59 |
| 2010 | 2.68 | 3.5 | 1.98 |
| 2009 | 2.84 | 4.16 | 2.03 |
| 2008 | 2.76 | 5.74 | 1.18 |
| 2007 | 4.11 | 6.52 | 1.66 |
| 2006 | 1.76 | 2.26 | 1.19 |
| 2005 | 1.26 | 1.66 | 0.94 |
| 2004 | 2.11 | 2.81 | 1.51 |
| 2003 | 2.75 | 3.55 | 2.03 |
| 2002 | 4.99 | 5.68 | 4.02 |
| 2001 | 7.46 | 9.41 | 5.03 |