| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.12 | 7.28 | 3.76 |
| 2024 | 3.86 | 5.01 | 2.96 |
| 2023 | 5.89 | 12.54 | 3.33 |
| 2022 | 6.68 | 9.59 | 4.6 |
| 2021 | 4.92 | 6.75 | 3.94 |
| 2020 | 4.13 | 4.7 | 2.84 |
| 2019 | 3.03 | 3.79 | 2.15 |
| 2018 | 3.2 | 4.11 | 2.07 |
| 2017 | 4.81 | 6.24 | 3.2 |
| 2016 | 4.87 | 7.54 | 3.92 |
| 2015 | 5.71 | 11.23 | 2.95 |
| 2014 | 4.85 | 6.2 | 3.86 |
| 2013 | 35.98 | 247.42 | 5.7 |
| 2012 | 28.86 | 60.02 | 20.19 |
| 2011 | 34.31 | 41.67 | 20.65 |
| 2010 | 32.57 | 38.4 | 26.51 |
| 2009 | 20.73 | 31.63 | 9.92 |
| 2008 | 22.2 | 40.95 | 5.33 |
| 2007 | 14.08 | 24.71 | 3.5 |
| 2006 | 3.27 | 4.01 | 2.35 |
| 2005 | 2.56 | 3.64 | 1.64 |
| 2004 | 3.61 | 5.13 | 2.93 |
| 2003 | 5.33 | 7.38 | 2.93 |
| 2002 | 7.8 | 9.76 | 4.76 |
| 2001 | 9.27 | 14.13 | 6.19 |
| 2000 | 10.9 | 14.7 | 7.93 |
| 1999 | 8.14 | 11.54 | 5.93 |
| 1998 | 5.78 | 9.93 | 2.93 |
| 1997 | 4.08 | 5.65 | 2.81 |