| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 6.7 | 8.29 | 5.3 |
| 2024 | 5 | 7.48 | 3.24 |
| 2023 | 1161.97 | 4493.18 | 4.87 |
| 2022 | 18.98 | 38.14 | 6.09 |
| 2021 | 5.52 | 7.03 | 3.57 |
| 2020 | 6.74 | 8.99 | 3.86 |
| 2019 | 4.78 | 8.02 | 2.19 |
| 2018 | 3.55 | 5.44 | 2.35 |
| 2017 | 3.65 | 6.57 | 2.54 |
| 2016 | 3.77 | 4.7 | 3.09 |
| 2015 | 4.92 | 8.4 | 3.02 |
| 2014 | 2.75 | 3.69 | 1.97 |
| 2013 | 2.47 | 3.11 | 2.2 |
| 2012 | 2.4 | 3.12 | 1.82 |
| 2011 | 4.15 | 5.36 | 1.89 |
| 2010 | 5.71 | 7.28 | 3.99 |
| 2009 | 3.34 | 7.04 | 1.33 |
| 2008 | 2.52 | 4.81 | 1.05 |
| 2007 | 3.28 | 5.5 | 1.27 |
| 2006 | 1.24 | 1.69 | 0.94 |
| 2005 | 0.95 | 1.2 | 0.75 |
| 2004 | 1.7 | 2.4 | 1.12 |
| 2003 | 2.22 | 2.96 | 1.75 |
| 2002 | 2.42 | 2.81 | 1.63 |
| 2001 | 2.85 | 3.44 | 2.09 |
| 2000 | 2.45 | 3.17 | 1.63 |
| 1999 | 2.86 | 3.74 | 2.12 |
| 1998 | 3.21 | 4.16 | 2.47 |