| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.63 | 4.78 | 1.35 |
| 2024 | 1.03 | 2.72 | 0.46 |
| 2023 | 3.13 | 8.97 | 0.75 |
| 2022 | 2.41 | 9.07 | 0.21 |
| 2021 | 0.43 | 0.9 | 0.25 |
| 2020 | 1.32 | 1.82 | 0.89 |
| 2019 | 1.97 | 2.56 | 1.69 |
| 2018 | 2.22 | 3.62 | 1.53 |
| 2017 | 3.04 | 5.17 | 2.39 |
| 2016 | 4.13 | 6.2 | 3.03 |
| 2015 | 6.63 | 8.67 | 5 |
| 2014 | 4.64 | 6.66 | 3.6 |
| 2013 | 5.48 | 6.95 | 4.22 |
| 2012 | 5.04 | 6.45 | 3.58 |
| 2011 | 10.14 | 42.71 | 3.31 |
| 2010 | 6.54 | 11.1 | 4.37 |
| 2009 | 4.89 | 8.37 | 1.92 |
| 2008 | 3.41 | 5.44 | 1.25 |
| 2007 | 3.29 | 5.28 | 1.47 |
| 2006 | 1.28 | 1.73 | 1.04 |
| 2005 | 1.13 | 1.41 | 0.88 |
| 2004 | 1.73 | 2.64 | 1.37 |