| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2024 | 3.61 | 4.23 | 2.93 |
| 2023 | 3.93 | 4.76 | 3.26 |
| 2022 | 3.58 | 4.38 | 2.39 |
| 2021 | 3.97 | 7.82 | 2.66 |
| 2020 | 2.55 | 3.25 | 2.24 |
| 2019 | 3.09 | 4.13 | 1.92 |
| 2018 | 1.88 | 2.43 | 1.48 |
| 2017 | 2.51 | 4.17 | 1.85 |
| 2016 | 4.72 | 5.43 | 3.6 |
| 2015 | 3.97 | 8.13 | 1.82 |
| 2014 | 2.07 | 3.31 | 1.47 |
| 2013 | 2.72 | 4.6 | 1.69 |
| 2012 | 3.71 | 4.9 | 2.67 |
| 2011 | 4.31 | 5.38 | 3.03 |
| 2010 | 6.02 | 10.68 | 3.95 |
| 2009 | 9.97 | 17.59 | 2.54 |
| 2008 | 5.74 | 13.04 | 2.06 |
| 2007 | 11.75 | 19.12 | 5.61 |
| 2006 | 1301.75 | 4955.89 | 3.17 |
| 2005 | 264.05 | 4162.95 | 9.17 |
| 2004 | 21.25 | 34.54 | 12.11 |