| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.35 | 3.56 | 1.48 |
| 2024 | 1.53 | 2.11 | 0.98 |
| 2023 | 1.81 | 2.61 | 1.48 |
| 2022 | 2.05 | 3.05 | 1.54 |
| 2021 | 4.27 | 6.76 | 2.68 |
| 2020 | 8.21 | 14.38 | 5.76 |
| 2019 | 6.3 | 9.14 | 4.89 |
| 2018 | 10.08 | 15.46 | 6.24 |
| 2017 | 93.63 | 264.27 | 12.72 |
| 2016 | 31.33 | 64.47 | 23.33 |
| 2015 | 26.96 | 50.52 | 13.88 |
| 2014 | 14.17 | 18.7 | 10.64 |
| 2013 | 11.36 | 12.99 | 9.8 |
| 2012 | 12.21 | 14.94 | 9.77 |
| 2011 | 15.58 | 23.24 | 10.49 |
| 2010 | 17.42 | 25.06 | 11.15 |
| 2009 | 13.89 | 18.57 | 8.18 |
| 2008 | 10.49 | 20.34 | 4.77 |
| 2007 | 12.48 | 21.09 | 4.38 |
| 2006 | 4.99 | 8.02 | 2.93 |
| 2005 | 3.18 | 4.62 | 2.17 |
| 2004 | 5.42 | 7.84 | 3.54 |
| 2003 | 8.02 | 9.67 | 5.52 |
| 2002 | 9.22 | 12.38 | 4.9 |
| 2001 | 12.7 | 17.55 | 7.12 |
| 2000 | 7.7 | 15.83 | 4.57 |
| 1999 | 4.86 | 6.4 | 3.8 |
| 1998 | 5.88 | 8.12 | 3.04 |