| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 33.65 | 38.45 | 29.51 |
| 2024 | 35.73 | 110.42 | 8.38 |
| 2023 | 10.34 | 19.04 | 7.58 |
| 2022 | 8.44 | 13.59 | 3.74 |
| 2021 | 5.76 | 8.43 | 4.51 |
| 2020 | 5.16 | 6.39 | 4.06 |
| 2019 | 4.55 | 5.67 | 3.21 |
| 2018 | 4.48 | 5.92 | 3.42 |
| 2017 | 5.98 | 8.48 | 3.66 |
| 2016 | 9.29 | 11.54 | 8.01 |
| 2015 | 13.35 | 28.01 | 5.78 |
| 2014 | 12.68 | 22.28 | 6 |
| 2013 | 4.43 | 8.28 | 2.53 |
| 2012 | 2.67 | 3.11 | 2.21 |
| 2011 | 4.13 | 6.01 | 2.4 |
| 2010 | 4.95 | 5.87 | 3.78 |
| 2009 | 4.01 | 5.25 | 2.09 |
| 2008 | 3.75 | 7.03 | 1.8 |
| 2007 | 4.83 | 7.09 | 3.32 |
| 2006 | 3.69 | 4.64 | 2.96 |
| 2005 | 3.8 | 5.37 | 2.88 |
| 2004 | 4.49 | 7.17 | 2.98 |
| 2003 | 6.84 | 8.02 | 4.96 |
| 2002 | 8.39 | 9.84 | 6.61 |
| 2001 | 14.35 | 18.58 | 11.12 |
| 2000 | 12.11 | 16.7 | 9.47 |
| 1999 | 7.6 | 12.13 | 3.99 |
| 1998 | 4.59 | 7.71 | 2.64 |
| 1997 | 2.9 | 4.06 | 2.27 |