| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.78 | 8.2 | 3.54 |
| 2024 | 4.02 | 5.77 | 2.45 |
| 2023 | 4.88 | 8.04 | 3.7 |
| 2022 | 5.77 | 7.61 | 3.7 |
| 2021 | 1.78 | 5.44 | 1.33 |
| 2020 | 1.66 | 2.08 | 1.4 |
| 2019 | 2.07 | 3.16 | 1.73 |
| 2018 | 2.6 | 4.27 | 1.74 |
| 2017 | 4.68 | 6.36 | 3.78 |
| 2016 | 8.76 | 14.23 | 6.23 |
| 2015 | 7.51 | 15.23 | 3.74 |
| 2014 | 3.79 | 5.08 | 2.85 |
| 2013 | 4.33 | 6.11 | 3.32 |
| 2012 | 3.85 | 5.45 | 2.81 |
| 2011 | 4.84 | 6.88 | 3.1 |
| 2010 | 4.68 | 5.53 | 3.72 |
| 2009 | 4.51 | 6.48 | 2.38 |
| 2008 | 11.2 | 44.19 | 1.75 |
| 2007 | 30.48 | 54.03 | 9.92 |
| 2006 | 6.57 | 12.21 | 5.19 |
| 2005 | 5.49 | 7.39 | 4.54 |
| 2004 | 8.21 | 11.98 | 6.03 |
| 2003 | 17.6 | 26.14 | 7.17 |
| 2002 | 355.65 | 1787.18 | 24.25 |
| 2001 | 390.29 | 770.3 | 35.89 |
| 2000 | 17.05 | 22.56 | 11.63 |
| 1999 | 7.37 | 9.58 | 6.03 |
| 1998 | 8.18 | 11.23 | 5.63 |