| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 0 | ||
| 2024 | 0 | ||
| 2023 | 0 | ||
| 2022 | 0 | ||
| 2021 | 0 | ||
| 2020 | 0 | -0.1 | |
| 2019 | 6.49 | 26.96 | 0.44 |
| 2018 | 1.39 | 2.08 | 0.51 |
| 2017 | 2.41 | 3.1 | 1.87 |
| 2016 | 3.31 | 4.41 | 2.72 |
| 2015 | 4.95 | 8.64 | 2.63 |
| 2014 | 2.24 | 3.1 | 1.61 |
| 2013 | 2.16 | 2.69 | 1.8 |
| 2012 | 2.1 | 2.71 | 1.54 |
| 2011 | 2.5 | 3.81 | 1.83 |
| 2010 | 2.12 | 2.59 | 1.62 |
| 2009 | 2.15 | 2.9 | 1.09 |
| 2008 | 3.18 | 9.99 | 0.96 |
| 2007 | 7.15 | 10.19 | 3.42 |
| 2006 | 2.09 | 4.04 | 1.17 |
| 2005 | 1.3 | 1.57 | 1.07 |
| 2004 | 1.46 | 1.73 | 1.19 |
| 2003 | 1.59 | 2.09 | 1.21 |
| 2002 | 2.5 | 2.85 | 2.09 |
| 2001 | 3.62 | 4.27 | 2.55 |