| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.04 | 3.95 | 2.34 |
| 2023 | 2.77 | 5.05 | 1.22 |
| 2022 | 1.7 | 3.04 | 1.21 |
| 2021 | 1.78 | 3.05 | 1.54 |
| 2020 | 2.41 | 2.97 | 1.81 |
| 2019 | 2.74 | 4.1 | 2.02 |
| 2018 | 4 | 6.14 | 2.81 |
| 2017 | 4.57 | 5.82 | 3.81 |
| 2016 | 4.82 | 6.71 | 3.58 |
| 2015 | 4.59 | 7.58 | 2.73 |
| 2014 | 3.97 | 4.94 | 3.35 |
| 2013 | 7.92 | 13.38 | 4.21 |
| 2012 | 12.99 | 17.41 | 9.59 |
| 2011 | 6.5 | 12.44 | 2.98 |
| 2010 | 3.17 | 7.69 | 1.88 |
| 2009 | 14.19 | 35.24 | 5.69 |
| 2008 | 13.05 | 25.26 | 4.83 |
| 2007 | 9.46 | 19.96 | 2.99 |
| 2006 | 59690.68 | 476176 | 2.13 |
| 2005 | 87097.15 | 462171 | 33.79 |
| 2004 | 44.55 | 87.27 | 29.28 |