| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.94 | 2.47 | 1.58 |
| 2024 | 1.68 | 2.29 | 1.14 |
| 2023 | 2.32 | 3.69 | 1.71 |
| 2022 | 3.35 | 4.23 | 2.66 |
| 2021 | 2.85 | 5.28 | 1.74 |
| 2020 | 2.05 | 2.78 | 1.61 |
| 2019 | 3.01 | 4.66 | 2.45 |
| 2018 | 14.41 | 40.51 | 2.89 |
| 2017 | 60.66 | 112.08 | 34.33 |
| 2016 | 40.65 | 71.65 | 14.09 |
| 2015 | 10.94 | 22.4 | 6.03 |
| 2014 | 4.08 | 6.03 | 2.42 |
| 2013 | 3.21 | 7.47 | 2.19 |
| 2012 | 3.87 | 4.67 | 3.15 |
| 2011 | 5.62 | 7.32 | 3.4 |
| 2010 | 8.42 | 11.14 | 6.13 |
| 2009 | 4.33 | 9.22 | 1.33 |
| 2008 | 2.82 | 6.32 | 1.07 |
| 2007 | 3.42 | 5.1 | 1.15 |
| 2006 | 0.97 | 1.22 | 0.74 |
| 2005 | 1.12 | 1.83 | 0.73 |
| 2004 | 1.66 | 2.82 | 1.06 |