| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 13.56 | 29.62 | 11.23 |
| 2024 | 12.25 | 14.52 | 9.62 |
| 2023 | 17.73 | 22.83 | 12.47 |
| 2022 | 16.13 | 19.87 | 12.91 |
| 2021 | 15.54 | 22.4 | 11 |
| 2020 | 13.9 | 20.39 | 9.15 |
| 2019 | 13.36 | 18.82 | 10.99 |
| 2018 | 17.6 | 30.61 | 12.09 |
| 2017 | 28.56 | 33.72 | 23.17 |
| 2016 | 29.14 | 34.89 | 22.7 |
| 2015 | 23.35 | 36.04 | 12.12 |
| 2014 | 11 | 13.63 | 7.92 |
| 2013 | 9.03 | 10.53 | 7.88 |
| 2012 | 10.58 | 13.84 | 6.85 |
| 2011 | 16.95 | 24.56 | 10.56 |
| 2010 | 20.99 | 29.67 | 16.11 |
| 2009 | 19.73 | 30.12 | 10.16 |
| 2008 | 9.35 | 15.36 | 5.03 |
| 2007 | 8.64 | 14.8 | 3.35 |
| 2006 | 3.09 | 4.4 | 1.96 |
| 2005 | 2.28 | 2.74 | 1.73 |
| 2004 | 4.22 | 10.58 | 2.22 |