| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 3.37 | 4.48 | 2.83 |
| 2024 | 3.01 | 4.46 | 1.54 |
| 2023 | 2.28 | 2.82 | 1.92 |
| 2022 | 9.25 | 31.01 | 1.88 |
| 2021 | 8.4 | 26.42 | 4.65 |
| 2020 | 3.98 | 5.7 | 2.92 |
| 2019 | 4.81 | 7.29 | 3.81 |
| 2018 | 0 | -3.47 | |
| 2017 | 125.56 | 409.62 | 21.87 |
| 2016 | 34.2 | 68.54 | 11.21 |
| 2015 | 14.19 | 20.34 | 8.43 |
| 2014 | 9 | 14.96 | 5.17 |
| 2013 | 6.27 | 8.25 | 4.44 |
| 2012 | 7.25 | 10.31 | 3.57 |
| 2011 | 8.64 | 13.41 | 4.61 |
| 2010 | 3.93 | 7.41 | 2.01 |
| 2009 | 2.14 | 2.66 | 1.5 |
| 2008 | 2.73 | 4.85 | 1.11 |
| 2007 | 2.79 | 4.99 | 0.99 |
| 2006 | 0.98 | 1.12 | 0.8 |
| 2005 | 0.9 | 1.2 | 0.66 |
| 2004 | 1.52 | 2.35 | 1 |
| 2003 | 2.24 | 2.7 | 1.68 |
| 2002 | 3.15 | 3.73 | 2.29 |
| 2001 | 3.95 | 4.85 | 3.22 |
| 2000 | 4.43 | 5.43 | 3.2 |
| 1999 | 3.92 | 5.55 | 1.84 |
| 1998 | 3.94 | 4.81 | 3.15 |