| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 2.35 | 6.48 | 1.26 |
| 2023 | 2.26 | 3.26 | 1.56 |
| 2022 | 1.78 | 2.4 | 1.38 |
| 2021 | 2.28 | 3.05 | 1.69 |
| 2020 | 2.77 | 3.74 | 1.9 |
| 2019 | 2.22 | 2.75 | 1.72 |
| 2018 | 2.54 | 3.41 | 1.75 |
| 2017 | 2.51 | 3.21 | 2.14 |
| 2016 | 14.02 | 36.62 | 2.47 |
| 2015 | 5.88 | 12.18 | 2.43 |
| 2014 | 4.67 | 7.14 | 3.14 |
| 2013 | 3.9 | 6.59 | 2.35 |
| 2012 | 2.93 | 3.73 | 2 |
| 2011 | 3.66 | 4.87 | 2.66 |
| 2010 | 3.99 | 5.38 | 2.99 |
| 2009 | 3.54 | 4.22 | 2.22 |
| 2008 | 4.34 | 9.11 | 1.49 |
| 2007 | 4.61 | 6.87 | 2.5 |
| 2006 | 2.75 | 4.01 | 1.99 |
| 2005 | 3.38 | 4.97 | 2.58 |
| 2004 | 4.56 | 6.25 | 3.48 |
| 2003 | 4.83 | 5.81 | 3.59 |
| 2002 | 7.3 | 8.15 | 6.32 |
| 2001 | 12.76 | 20.45 | 7.61 |
| 2000 | 17.8 | 21.52 | 12.38 |