| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.39 | 2.5 | 2.24 |
| 2024 | 2.22 | 2.69 | 1.93 |
| 2023 | 3.18 | 4.76 | 2.13 |
| 2022 | 4.61 | 5.42 | 3.98 |
| 2021 | 5.3 | 5.93 | 4.89 |
| 2020 | 5.58 | 6.16 | 5 |
| 2019 | 6.08 | 7.48 | 5.44 |
| 2018 | 7.49 | 10.05 | 5.26 |
| 2017 | 11.01 | 12.91 | 9.45 |
| 2016 | 12.74 | 16.13 | 11.79 |
| 2015 | 17.6 | 26.44 | 12.67 |
| 2014 | 10.37 | 18.85 | 8.08 |
| 2013 | 10.53 | 13.46 | 8.38 |
| 2012 | 10.17 | 12.35 | 7.5 |
| 2011 | 12.03 | 15.4 | 9.42 |
| 2010 | 18.07 | 28.18 | 11.89 |
| 2009 | 20.59 | 26.36 | 14.56 |
| 2008 | 50.44 | 139.61 | 10.52 |
| 2007 | 49.48 | 112.88 | 15.03 |
| 2006 | 12.81 | 17.53 | 7.96 |
| 2005 | 11.56 | 15.73 | 6.02 |
| 2004 | 11.34 | 20.55 | 6.91 |