| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 1.56 | 2.52 | 1.34 |
| 2025 | 1.53 | 1.64 | 1.38 |
| 2024 | 1.44 | 1.76 | 1.15 |
| 2023 | 1.79 | 2.18 | 1.56 |
| 2022 | 1.62 | 1.84 | 1.42 |
| 2021 | 1.71 | 1.9 | 1.47 |
| 2020 | 1.83 | 2.35 | 1.6 |
| 2019 | 1.64 | 2.07 | 1.42 |
| 2018 | 1.69 | 2.02 | 1.37 |
| 2017 | 2.22 | 2.61 | 1.91 |
| 2016 | 2.37 | 2.74 | 2.04 |
| 2015 | 3.05 | 5.34 | 2.18 |
| 2014 | 2.01 | 2.62 | 1.62 |
| 2013 | 1.98 | 2.84 | 1.66 |
| 2012 | 1.8 | 2.18 | 1.41 |
| 2011 | 2.77 | 3.53 | 1.78 |
| 2010 | 3.14 | 3.92 | 2.2 |
| 2009 | 2.88 | 3.51 | 2.18 |
| 2008 | 3.19 | 6.27 | 1.6 |
| 2007 | 3.38 | 5.51 | 1.73 |
| 2006 | 1.64 | 2.34 | 1.17 |
| 2005 | 1.77 | 2.16 | 1.03 |
| 2004 | 2.61 | 3.63 | 1.92 |
| 2003 | 3.01 | 4.4 | 2.05 |
| 2002 | 4.74 | 4.93 | 4.62 |