| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.69 | 6.23 | 1.65 |
| 2024 | 1.19 | 2.68 | 0.53 |
| 2023 | 1 | 1.58 | 0.8 |
| 2022 | 1.35 | 2.13 | 1.01 |
| 2021 | 0.57 | 1.85 | 0.43 |
| 2020 | 0.85 | 1.16 | 0.52 |
| 2019 | 1.51 | 2.78 | 1.06 |
| 2018 | 2.63 | 6.15 | 1.53 |
| 2017 | 5.38 | 8.07 | 4.25 |
| 2016 | 16.26 | 32.76 | 7.91 |
| 2015 | 6.92 | 17.82 | 1.95 |
| 2014 | 2.63 | 4.53 | 1.91 |
| 2013 | 776.08 | 3590.04 | 3.9 |
| 2012 | 3422.91 | 10231.2 | 476.53 |
| 2011 | 670.53 | 1184.95 | 31.79 |
| 2010 | 277.91 | 1221.62 | 28.2 |
| 2009 | 293.01 | 1414.69 | 1.56 |
| 2008 | 7.99 | 32.74 | 1.14 |
| 2007 | 20.05 | 40.03 | 5.85 |
| 2006 | 4.27 | 7.2 | 3.37 |
| 2005 | 3.69 | 5.56 | 2.74 |
| 2004 | 5.02 | 7.29 | 3.12 |