| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.77 | 3.23 | 2.41 |
| 2024 | 2.22 | 3.24 | 1.79 |
| 2023 | 2.33 | 2.68 | 2.04 |
| 2022 | 32.9 | 107.29 | 1.77 |
| 2021 | 11.67 | 105.22 | 0.15 |
| 2020 | 0.33 | 0.39 | 0.22 |
| 2019 | 0.28 | 0.4 | 0.19 |
| 2018 | 0.28 | 0.38 | 0.18 |
| 2017 | 0.52 | 0.7 | 0.36 |
| 2016 | 0.74 | 0.98 | 0.61 |
| 2015 | 1.08 | 1.92 | 0.75 |
| 2014 | 0.99 | 1.38 | 0.77 |
| 2013 | 1.03 | 1.29 | 0.8 |
| 2012 | 1.07 | 1.56 | 0.68 |
| 2011 | 1.89 | 2.87 | 1.08 |
| 2010 | 2.02 | 2.51 | 1.49 |
| 2009 | 1.12 | 1.58 | 0.62 |
| 2008 | 1.07 | 2.22 | 0.43 |
| 2007 | 1.62 | 2.45 | 0.79 |
| 2006 | 0.8 | 0.97 | 0.66 |
| 2005 | 0.77 | 0.95 | 0.51 |
| 2004 | 0.95 | 1.67 | 0.6 |