| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 14.93 | 16.47 | 13.19 |
| 2024 | 18.43 | 39.18 | 15.08 |
| 2023 | 37.47 | 65.19 | 15.24 |
| 2022 | 10.7 | 12 | 8.88 |
| 2021 | 0.68 | 0.83 | 0.57 |
| 2020 | 0.61 | 0.8 | 0.44 |
| 2019 | 0.59 | 0.72 | 0.51 |
| 2018 | 0.77 | 0.95 | 0.52 |
| 2017 | 0.94 | 1.05 | 0.84 |
| 2016 | 1.17 | 1.53 | 0.96 |
| 2015 | 1.88 | 2.82 | 1.29 |
| 2014 | 0.96 | 1.68 | 0.78 |
| 2013 | 1.07 | 1.31 | 0.95 |
| 2012 | 1.38 | 1.82 | 0.96 |
| 2011 | 2.33 | 3.25 | 1.31 |
| 2010 | 3.32 | 5.53 | 2.15 |
| 2009 | 2.73 | 3.65 | 1.46 |
| 2008 | 2.89 | 6.38 | 1.12 |
| 2007 | 3.92 | 6.53 | 1.99 |
| 2006 | 1.97 | 5.53 | 0.68 |
| 2005 | 1.17 | 1.74 | 0.76 |
| 2004 | 2.92 | 6.15 | 1.55 |
| 2003 | 3.06 | 5.48 | 1.84 |
| 2002 | 3.45 | 4.96 | 1.76 |
| 2001 | 2.38 | 2.81 | 1.56 |
| 2000 | 2.46 | 3.33 | 1.56 |