| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 19.33 | 41.46 | 9.28 |
| 2024 | 7.87 | 11.29 | 4.95 |
| 2023 | 5.37 | 8.23 | 3.51 |
| 2022 | 4.19 | 5.07 | 3.5 |
| 2021 | 3.61 | 5.84 | 2.59 |
| 2020 | 3.12 | 5.37 | 1.56 |
| 2019 | 1.41 | 1.9 | 0.93 |
| 2018 | 1.56 | 2.28 | 0.93 |
| 2017 | 2.71 | 2.97 | 1.85 |
| 2016 | 2.58 | 3.55 | 2.07 |
| 2015 | 2.58 | 4.51 | 1.77 |
| 2014 | 1.76 | 2.21 | 1.41 |
| 2013 | 1.89 | 2.8 | 1.4 |
| 2012 | 2.91 | 3.5 | 2.41 |
| 2011 | 3.73 | 4.26 | 2.97 |
| 2010 | 3.99 | 5.28 | 3.04 |
| 2009 | 3.9 | 4.94 | 2.19 |
| 2008 | 4.36 | 8.54 | 1.81 |
| 2007 | 5.47 | 9.12 | 2.36 |
| 2006 | 2.27 | 2.96 | 1.65 |
| 2005 | 1.81 | 2.51 | 1.24 |
| 2004 | 2.88 | 4.14 | 2.24 |
| 2003 | 3.11 | 3.95 | 2.23 |
| 2002 | 4.35 | 4.85 | 3.17 |
| 2001 | 5.79 | 7.42 | 4.1 |
| 2000 | 5.93 | 8.19 | 3.71 |
| 1999 | 4.76 | 6.53 | 3.44 |
| 1998 | 6.81 | 8.91 | 4.42 |
| 1997 | 10.84 | 18.97 | 6.8 |