| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.41 | 3.54 | 1.44 |
| 2024 | 0.84 | 1.68 | 0.58 |
| 2023 | 0.99 | 1.11 | 0.91 |
| 2022 | 0.89 | 1.23 | 0.64 |
| 2021 | 0.78 | 1.02 | 0.62 |
| 2020 | 0.89 | 1.22 | 0.73 |
| 2019 | 0.93 | 1.19 | 0.79 |
| 2018 | 1.08 | 1.4 | 0.76 |
| 2017 | 1.87 | 2.58 | 1.33 |
| 2016 | 1.7 | 2.28 | 1.2 |
| 2015 | 1.47 | 2.13 | 0.87 |
| 2014 | 1.1 | 1.48 | 0.88 |
| 2013 | 1.03 | 1.23 | 0.85 |
| 2012 | 1.16 | 1.52 | 0.88 |
| 2011 | 1.89 | 2.66 | 1.07 |
| 2010 | 1.99 | 2.7 | 1.48 |
| 2009 | 2.16 | 3.19 | 1.26 |
| 2008 | 3.27 | 7.39 | 0.9 |
| 2007 | 10.72 | 21.55 | 4.14 |
| 2006 | 18.17 | 197.88 | 4.48 |
| 2005 | 1.74 | 5.61 | 0.25 |
| 2004 | 0.48 | 0.64 | 0.33 |