| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 18.1 | 24.21 | 15.24 |
| 2024 | 13.18 | 20.59 | 9.67 |
| 2023 | 14.53 | 16.09 | 12.74 |
| 2022 | 14.32 | 16.92 | 12.14 |
| 2021 | 118.31 | 492.18 | 2.86 |
| 2020 | 2.89 | 3.69 | 2.36 |
| 2019 | 2.85 | 3.44 | 2.51 |
| 2018 | 2.73 | 3.12 | 2.35 |
| 2017 | 3.93 | 5.75 | 2.78 |
| 2016 | 4.41 | 6.52 | 3.58 |
| 2015 | 5.31 | 10.75 | 2.71 |
| 2014 | 2.26 | 3.23 | 1.66 |
| 2013 | 1.66 | 1.99 | 1.42 |
| 2012 | 1.56 | 1.96 | 1.36 |
| 2011 | 2.36 | 2.98 | 1.54 |
| 2010 | 3.07 | 3.75 | 2.45 |
| 2009 | 2.37 | 4.1 | 1.1 |
| 2008 | 2.07 | 3.52 | 0.86 |
| 2007 | 3.07 | 3.99 | 2.08 |
| 2006 | 1.67 | 2.05 | 1.16 |
| 2005 | 0.87 | 1.21 | 0.57 |
| 2004 | 0.85 | 1.42 | 0.58 |