| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 5.52 | 5.98 | 5 |
| 2024 | 6.3 | 14.24 | 3.63 |
| 2023 | 63.56 | 204.5 | 7.4 |
| 2022 | 14.3 | 20.6 | 9.14 |
| 2021 | 7.85 | 11.02 | 5.48 |
| 2020 | 6.81 | 8.92 | 5.6 |
| 2019 | 9.1 | 12.57 | 5.95 |
| 2018 | 6.17 | 9.12 | 3.6 |
| 2017 | 11.75 | 14.85 | 8.15 |
| 2016 | 16.29 | 20.69 | 14.19 |
| 2015 | 38.02 | 116.14 | 14.22 |
| 2014 | 38.28 | 59.9 | 21.94 |
| 2013 | 25.22 | 29.48 | 19.04 |
| 2012 | 22.86 | 26.92 | 14.92 |
| 2011 | 25.97 | 32.28 | 22.81 |
| 2010 | 25.09 | 45.92 | 10.25 |
| 2009 | 4.95 | 12.71 | 1.14 |
| 2008 | 2.12 | 4.51 | 0.96 |
| 2007 | 3.44 | 4.97 | 1.73 |
| 2006 | 1.7 | 2.17 | 1.19 |
| 2005 | 2.06 | 3.31 | 1.21 |
| 2004 | 4.39 | 6.46 | 3.09 |
| 2003 | 3.49 | 4.05 | 3.14 |
| 2002 | 4.19 | 5.06 | 3.02 |
| 2001 | 4.52 | 5.84 | 2.99 |
| 2000 | 4.25 | 6.21 | 2.81 |
| 1999 | 2.79 | 3.7 | 2.14 |
| 1998 | 2.84 | 3.55 | 2.15 |