| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 9.97 | 12.59 | 8.85 |
| 2024 | 4.92 | 13.58 | 1.09 |
| 2023 | 3.24 | 4.13 | 2.54 |
| 2022 | 4.61 | 8.25 | 2.92 |
| 2021 | 5.25 | 8.99 | 2.31 |
| 2020 | 2.88 | 4.98 | 1.34 |
| 2019 | 1.63 | 2.17 | 1.29 |
| 2018 | 1.66 | 2.19 | 1.25 |
| 2017 | 2.86 | 3.88 | 2.04 |
| 2016 | 3.89 | 4.53 | 2.74 |
| 2015 | 11.28 | 89.42 | 3.35 |
| 2014 | 23.44 | 78.94 | 13.94 |
| 2013 | 15.65 | 20.85 | 13.14 |
| 2012 | 15.66 | 20.7 | 8.49 |
| 2011 | 12.39 | 15.94 | 8.17 |
| 2010 | 9.21 | 14.51 | 6.64 |
| 2009 | 11.98 | 19.58 | 4.7 |
| 2008 | 22.23 | 46.94 | 3.31 |
| 2007 | 27.38 | 40.77 | 7.86 |
| 2006 | 4.11 | 8.73 | 2.67 |
| 2005 | 2.34 | 3.24 | 1.56 |
| 2004 | 4.15 | 7.4 | 2.63 |