| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.64 | 5.32 | 3.73 |
| 2024 | 3 | 5.43 | 1.89 |
| 2023 | 3.17 | 3.98 | 2.66 |
| 2022 | 3.77 | 5.45 | 2.7 |
| 2021 | 5.77 | 8.85 | 4.14 |
| 2020 | 3.53 | 8.21 | 1.75 |
| 2019 | 2.11 | 2.69 | 1.48 |
| 2018 | 1.57 | 2.13 | 1.14 |
| 2017 | 2.56 | 3.24 | 2.05 |
| 2016 | 2.66 | 3.09 | 2.21 |
| 2015 | 4.32 | 7.45 | 2.31 |
| 2014 | 3.05 | 4.94 | 2.28 |
| 2013 | 2.69 | 3.47 | 2.15 |
| 2012 | 2.19 | 3.02 | 1.46 |
| 2011 | 4.35 | 5.5 | 2.5 |
| 2010 | 6.49 | 11.74 | 4 |
| 2009 | 4.74 | 7.39 | 2.88 |
| 2008 | 3.89 | 8.78 | 1.92 |
| 2007 | 5.62 | 7.53 | 3.55 |
| 2006 | 4.54 | 8.24 | 1.74 |
| 2005 | 1.49 | 2.28 | 0.95 |
| 2004 | 1.36 | 2.19 | 0.99 |
| 2003 | 1.7 | 2.07 | 1.27 |
| 2002 | 2.22 | 2.73 | 1.73 |
| 2001 | 3.09 | 3.56 | 2.55 |