| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 12.87 | 13.51 | 11.17 |
| 2024 | 15.24 | 24.16 | 8.99 |
| 2023 | 23.62 | 24.06 | 23.08 |
| 2022 | 0 | -2.43 | |
| 2021 | 7.55 | 11.09 | 5.97 |
| 2020 | 9.39 | 13.12 | 6.84 |
| 2019 | 17.17 | 26.7 | 12.61 |
| 2018 | 26.98 | 60 | 10.87 |
| 2017 | 28.85 | 63.32 | 7.82 |
| 2016 | 6.84 | 8.43 | 5.96 |
| 2015 | 7.66 | 10.2 | 5.93 |
| 2014 | 4.97 | 7.04 | 4.23 |
| 2013 | 13.64 | 36.7 | 4.32 |
| 2012 | 20.06 | 29.39 | 13.56 |
| 2011 | 12.81 | 18.43 | 9.84 |
| 2010 | 9.17 | 11.78 | 6.74 |
| 2009 | 241.29 | 770.68 | 9.99 |
| 2008 | 136.56 | 663 | 13.18 |
| 2007 | 24.53 | 35.13 | 17.19 |
| 2006 | 14.28 | 17.67 | 10.84 |
| 2005 | 4.46 | 11.56 | 2.44 |
| 2004 | 2.97 | 3.9 | 2.24 |
| 2003 | 2.76 | 3.78 | 1.94 |
| 2002 | 2.63 | 3.53 | 1.89 |
| 2001 | 3.58 | 5.37 | 2.08 |
| 2000 | 1.92 | 2.69 | 1.13 |
| 1999 | 1.46 | 2.69 | 0.86 |
| 1998 | 1.48 | 2 | 0.84 |
| 1997 | 2.69 | 3.46 | 1.9 |