| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 7.88 | 9.5 | 6.17 |
| 2023 | 9.2 | 12.37 | 6.44 |
| 2022 | 6.21 | 7.99 | 4.56 |
| 2021 | 10.61 | 17.01 | 6.49 |
| 2020 | 8.98 | 13.95 | 4.55 |
| 2019 | 6.21 | 7.54 | 4.91 |
| 2018 | 11.04 | 16.29 | 5.43 |
| 2017 | 10.24 | 15.11 | 6.04 |
| 2016 | 100.91 | 369.1 | 7.63 |
| 2015 | 20.68 | 445.71 | 4.14 |
| 2014 | 2.54 | 5.86 | 0.98 |
| 2013 | 1.03 | 1.64 | 0.74 |
| 2012 | 0.94 | 1.15 | 0.73 |
| 2011 | 1.14 | 1.47 | 0.8 |
| 2010 | 1.09 | 1.44 | 0.74 |
| 2009 | 0.88 | 1.2 | 0.45 |
| 2008 | 0.52 | 0.78 | 0.27 |
| 2007 | 0.66 | 0.96 | 0.44 |
| 2006 | 0.64 | 0.93 | 0.43 |
| 2005 | 0.77 | 1.04 | 0.5 |