| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.76 | 5.1 | 2.86 |
| 2023 | 4.76 | 7.7 | 3.26 |
| 2022 | 7.02 | 9.67 | 5.55 |
| 2021 | 6.52 | 8.23 | 4.47 |
| 2020 | 3.85 | 6.49 | 1.6 |
| 2019 | 2.27 | 2.95 | 1.19 |
| 2018 | 2.9 | 4.05 | 2.14 |
| 2017 | 4.45 | 5.9 | 2.9 |
| 2016 | 7.23 | 9.55 | 5.43 |
| 2015 | 9.73 | 18.7 | 6.31 |
| 2014 | 6.42 | 9.64 | 3.94 |
| 2013 | 17.36 | 127.68 | 4.16 |
| 2012 | 33.85 | 111.27 | 14.66 |
| 2011 | 17.14 | 20.01 | 13.67 |
| 2010 | 89.25 | 269.51 | 16.98 |
| 2009 | 106.89 | 231.49 | 12.73 |
| 2008 | 28.91 | 65.2 | 9.4 |
| 2007 | 48.95 | 99.85 | 17.89 |
| 2006 | 10.51 | 18.22 | 3.91 |
| 2005 | 3.72 | 5.49 | 2.4 |