| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 7.09 | 8.27 | 6.5 |
| 2025 | 4.13 | 6.99 | 3.11 |
| 2024 | 3.85 | 5.16 | 2.76 |
| 2023 | 3.43 | 4.86 | 2.21 |
| 2022 | 4.95 | 5.81 | 3.79 |
| 2021 | 5.37 | 8.29 | 3.64 |
| 2020 | 4.14 | 5.86 | 2.78 |
| 2019 | 4.82 | 7.13 | 3.39 |
| 2018 | 12.44 | 30.56 | 4.52 |
| 2017 | 423.33 | 985 | 26.33 |
| 2016 | 116.78 | 252.54 | 53.41 |
| 2015 | 72.3 | 106.2 | 41.32 |
| 2014 | 35.63 | 54.83 | 16.96 |
| 2013 | 22.08 | 32.09 | 12.66 |
| 2012 | 11.71 | 17.02 | 2.95 |
| 2011 | 4.29 | 5.71 | 2.7 |
| 2010 | 2.14 | 2.88 | 1.17 |
| 2009 | 1.76 | 2.96 | 0.58 |
| 2008 | 1.19 | 1.71 | 0.42 |
| 2007 | 1.27 | 2.08 | 0.67 |
| 2006 | 0.69 | 0.94 | 0.5 |
| 2005 | 0.79 | 1.07 | 0.56 |
| 2004 | 1.36 | 2.36 | 0.81 |