| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 27.94 | 51 | 13.48 |
| 2024 | 11.57 | 19.37 | 7.21 |
| 2023 | 15.21 | 20.27 | 11.55 |
| 2022 | 16.78 | 23.67 | 12.45 |
| 2021 | 10.28 | 14.35 | 5.67 |
| 2020 | 5.72 | 7.37 | 2.95 |
| 2019 | 4.45 | 5.45 | 3.29 |
| 2018 | 5.08 | 6.83 | 3.02 |
| 2017 | 7.78 | 10.43 | 5.74 |
| 2016 | 12.22 | 21.96 | 7.65 |
| 2015 | 20.64 | 42.39 | 7.32 |
| 2014 | 6.12 | 9.78 | 3.79 |
| 2013 | 3.84 | 4.73 | 2.95 |
| 2012 | 3.23 | 3.91 | 2.67 |
| 2011 | 3.98 | 4.76 | 2.72 |
| 2010 | 4.61 | 5.93 | 3.45 |
| 2009 | 4.04 | 5.48 | 2.51 |
| 2008 | 4.97 | 9.02 | 1.92 |
| 2007 | 7.05 | 10.6 | 3.57 |
| 2006 | 3.02 | 4.5 | 1.7 |
| 2005 | 2.25 | 3.57 | 1.54 |
| 2004 | 4.36 | 7.15 | 1.87 |
| 2003 | 7.76 | 9.53 | 6.56 |
| 2002 | 6.97 | 8.54 | 4.84 |
| 2001 | 5.8 | 6.87 | 3.94 |