| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 7.2 | 8.18 | 6.61 |
| 2024 | 5.81 | 10.35 | 4.77 |
| 2023 | 190.39 | 219.37 | 128.58 |
| 2022 | 78.56 | 237.39 | 9.02 |
| 2021 | 6.85 | 10.04 | 2.93 |
| 2020 | 4.22 | 8.27 | 2.05 |
| 2019 | 2.58 | 3.64 | 2.07 |
| 2018 | 4.02 | 5.36 | 2.13 |
| 2017 | 5.72 | 7.42 | 4.56 |
| 2016 | 12.21 | 26.76 | 6.39 |
| 2015 | 11.14 | 26.76 | 3.29 |
| 2014 | 3 | 3.64 | 2.44 |
| 2013 | 2.72 | 3.51 | 2.25 |
| 2012 | 3.14 | 3.84 | 2.31 |
| 2011 | 4.12 | 5.36 | 3.11 |
| 2010 | 4.32 | 6.08 | 2.93 |
| 2009 | 4.1 | 5.47 | 2.28 |
| 2008 | 4.46 | 9.79 | 1.67 |
| 2007 | 5.47 | 7.79 | 2.82 |
| 2006 | 1.72 | 2.62 | 0.72 |
| 2005 | 1.13 | 1.64 | 0.72 |
| 2004 | 1.21 | 1.51 | 0.96 |
| 2003 | 1.47 | 1.87 | 1.17 |
| 2002 | 2.38 | 2.66 | 2.06 |
| 2001 | 2.99 | 3.5 | 2.06 |
| 2000 | 4.67 | 5.71 | 3.23 |
| 1999 | 4.25 | 5.75 | 2.73 |
| 1998 | 3.75 | 5.62 | 2.66 |