| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.02 | 2.42 | 1.64 |
| 2023 | 3.31 | 4.86 | 1.99 |
| 2022 | 3.94 | 5.19 | 2.56 |
| 2021 | 8.6 | 21.4 | 3.68 |
| 2020 | 10.39 | 16.11 | 5.56 |
| 2019 | 5.7 | 7.91 | 4.11 |
| 2018 | 3.86 | 4.98 | 2.92 |
| 2017 | 3.28 | 3.8 | 2.66 |
| 2016 | 2.27 | 2.81 | 1.68 |
| 2015 | 2.85 | 4.77 | 1.81 |
| 2014 | 2.25 | 2.65 | 1.97 |
| 2013 | 2.51 | 3.12 | 2.2 |
| 2012 | 3.86 | 7.06 | 1.99 |
| 2011 | 12.07 | 15.07 | 5.14 |
| 2010 | 8.55 | 16.45 | 4.77 |
| 2009 | 4.6 | 5.76 | 3.1 |
| 2008 | 3.99 | 6.89 | 2.08 |
| 2007 | 6.9 | 10.48 | 4.07 |
| 2006 | 3.7 | 4.86 | 1.82 |
| 2005 | 1.72 | 2.25 | 1.18 |
| 2004 | 2.48 | 4.95 | 1.28 |