| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.46 | 2.42 | 0.43 |
| 2024 | 3.84 | 6.5 | 2.01 |
| 2023 | 9.18 | 15.78 | 5.39 |
| 2022 | 7.57 | 12.59 | 6.19 |
| 2021 | 0 | -0.41 | |
| 2020 | 13.33 | 31.48 | 1.94 |
| 2019 | 2.78 | 3.74 | 1.84 |
| 2018 | 2.16 | 2.65 | 1.61 |
| 2017 | 3.25 | 4.58 | 2.5 |
| 2016 | 3.62 | 4.58 | 2.19 |
| 2015 | 6.01 | 16.23 | 2 |
| 2014 | 5.77 | 10.22 | 3.94 |
| 2013 | 2.98 | 5.84 | 1.99 |
| 2012 | 2.97 | 4.47 | 1.99 |
| 2011 | 5.33 | 7.92 | 3.29 |
| 2010 | 8.03 | 10.55 | 5.5 |
| 2009 | 10.5 | 12.37 | 7.93 |
| 2008 | 0 | ||
| 2007 | 6.43 | 10.25 | 3.97 |
| 2006 | 3.9 | 6.11 | 1.04 |
| 2005 | 1.48 | 1.91 | 1.01 |
| 2004 | 2.66 | 4.43 | 1.65 |
| 2003 | 4.61 | 6.08 | 3.25 |
| 2002 | 6.33 | 9.46 | 4.02 |
| 2001 | 8.1 | 9.76 | 6.66 |