| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0.17 | 0.23 | 0.16 |
| 2024 | 0.13 | 0.21 | 0.09 |
| 2023 | 0.12 | 0.16 | 0.1 |
| 2022 | 0.16 | 0.23 | 0.12 |
| 2021 | 0.14 | 0.17 | 0.12 |
| 2020 | 0.17 | 0.21 | 0.13 |
| 2019 | 0.22 | 0.29 | 0.16 |
| 2018 | 0.25 | 0.37 | 0.17 |
| 2017 | 0.6 | 0.91 | 0.32 |
| 2016 | 1.43 | 2.22 | 0.84 |
| 2015 | 2.8 | 4.88 | 1.37 |
| 2014 | 1.53 | 2.25 | 1.21 |
| 2013 | 1.42 | 2.65 | 0.84 |
| 2012 | 1.89 | 2.04 | 1.73 |
| 2011 | 0 | 0 | |
| 2010 | 129.07 | 145.07 | 118.77 |
| 2009 | 51.82 | 163.18 | 4.91 |
| 2008 | 22.63 | 58.86 | 3.1 |
| 2007 | 14.03 | 58.08 | 1.36 |
| 2006 | 1.11 | 1.4 | 0.84 |
| 2005 | 0.91 | 1.06 | 0.7 |
| 2004 | 1.96 | 3.38 | 0.99 |