| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.61 | 18.09 | 14.31 |
| 2024 | 14.61 | 19.32 | 11.3 |
| 2023 | 16.08 | 18.65 | 14.7 |
| 2022 | 107.04 | 113.45 | 95.95 |
| 2021 | 37.37 | 115.67 | 7.36 |
| 2020 | 8.96 | 10.82 | 6.67 |
| 2019 | 8.5 | 9.83 | 6.62 |
| 2018 | 7.66 | 10.94 | 5.32 |
| 2017 | 17.34 | 44.63 | 4.82 |
| 2016 | 6.75 | 9.41 | 4.78 |
| 2015 | 7.19 | 12.05 | 3.69 |
| 2014 | 2.12 | 4.01 | 1.54 |
| 2013 | 2.15 | 3.07 | 1.52 |
| 2012 | 2.42 | 3.18 | 1.79 |
| 2011 | 4.02 | 5.38 | 2.34 |
| 2010 | 4.91 | 6.22 | 4.03 |
| 2009 | 3.67 | 5.86 | 2.02 |
| 2008 | 4.23 | 10 | 1.48 |
| 2007 | 10.13 | 18.65 | 6.46 |
| 2006 | 3.63 | 5.88 | 2.28 |
| 2005 | 2.43 | 2.78 | 2.15 |
| 2004 | 3.55 | 5.54 | 2.54 |
| 2003 | 3.33 | 4.13 | 2.42 |
| 2002 | 2.73 | 3.26 | 1.85 |
| 2001 | 3.28 | 3.93 | 2.37 |
| 2000 | 2.93 | 4.11 | 2.14 |
| 1999 | 2.44 | 3.47 | 1.68 |
| 1998 | 2.17 | 2.82 | 1.74 |
| 1997 | 3.38 | 4.44 | 2.49 |