| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.58 | 0.66 | 0.51 |
| 2024 | 0.56 | 0.67 | 0.44 |
| 2023 | 0.7 | 0.78 | 0.65 |
| 2022 | 0.79 | 1.07 | 0.62 |
| 2021 | 1.03 | 1.27 | 0.81 |
| 2020 | 1.18 | 1.63 | 0.84 |
| 2019 | 1.02 | 1.4 | 0.86 |
| 2018 | 1.21 | 1.57 | 0.81 |
| 2017 | 1.84 | 2.16 | 1.49 |
| 2016 | 2.21 | 2.74 | 1.94 |
| 2015 | 2.82 | 4.37 | 1.94 |
| 2014 | 1.92 | 2.67 | 1.49 |
| 2013 | 5.22 | 10.36 | 2.01 |
| 2012 | 10500.73 | 33496.9 | 1277.54 |
| 2011 | 3227.11 | 5644.03 | 1377.35 |
| 2010 | 2581.93 | 5644.03 | 1045.42 |
| 2009 | 864.95 | 1412.57 | 392.03 |
| 2008 | 542.49 | 563.82 | 397.63 |
| 2007 | 788.12 | 1407.33 | 563.82 |
| 2006 | 11.91 | 42.11 | 3.1 |
| 2005 | 2.58 | 4.16 | 1.73 |
| 2004 | 5.34 | 14.49 | 2.09 |