| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.57 | 12.12 | 8.86 |
| 2024 | 8.88 | 11.27 | 6.23 |
| 2023 | 9.74 | 9.91 | 9.38 |
| 2022 | 7.42 | 25.15 | 3.28 |
| 2021 | 2.04 | 6.13 | 1.42 |
| 2020 | 1.69 | 2.16 | 1.35 |
| 2019 | 1.37 | 1.85 | 1.13 |
| 2018 | 1.3 | 1.47 | 1.1 |
| 2017 | 1.7 | 2.04 | 1.37 |
| 2016 | 2.4 | 4.39 | 1.86 |
| 2015 | 3.14 | 5.25 | 2.21 |
| 2014 | 2.24 | 3.49 | 1.79 |
| 2013 | 1.88 | 2.12 | 1.68 |
| 2012 | 2.18 | 2.55 | 1.57 |
| 2011 | 2.7 | 3.16 | 2.24 |
| 2010 | 3 | 3.59 | 2.51 |
| 2009 | 2.9 | 3.83 | 2.05 |
| 2008 | 3.29 | 7.84 | 1.12 |
| 2007 | 5.87 | 8.28 | 2.47 |
| 2006 | 2.61 | 3.68 | 1.9 |
| 2005 | 2.2 | 2.96 | 1.76 |
| 2004 | 4.31 | 13.51 | 2.06 |
| 2003 | 10.99 | 14.5 | 2.38 |
| 2002 | 5.64 | 5.92 | 5.1 |