| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.64 | 3.39 | 2.45 |
| 2024 | 3.34 | 5.66 | 2.11 |
| 2023 | 9.23 | 17.54 | 4.81 |
| 2022 | 15.33 | 27.76 | 8.93 |
| 2021 | 13.87 | 16.88 | 11.61 |
| 2020 | 16.25 | 20.64 | 13.14 |
| 2019 | 20.05 | 28.48 | 15.62 |
| 2018 | 26.99 | 40.95 | 19.25 |
| 2017 | 42.5 | 54.01 | 29.77 |
| 2016 | 61.87 | 73.57 | 49.31 |
| 2015 | 27.02 | 84.97 | 4.75 |
| 2014 | 4.71 | 6.21 | 3.75 |
| 2013 | 3.34 | 4.82 | 2.91 |
| 2012 | 3.5 | 4.67 | 2.9 |
| 2011 | 5.42 | 7.48 | 3.28 |
| 2010 | 5.54 | 7.28 | 3.83 |
| 2009 | 3.31 | 6.29 | 1.12 |
| 2008 | 1.64 | 3.51 | 0.71 |
| 2007 | 2.43 | 4.41 | 0.74 |
| 2006 | 0.73 | 1.04 | 0.57 |
| 2005 | 0.58 | 0.79 | 0.27 |
| 2004 | 0.43 | 0.84 | 0.27 |