| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 4.47 | 6.27 | 3.42 |
| 2024 | 3.28 | 4.92 | 2.19 |
| 2023 | 4.46 | 5.76 | 3.79 |
| 2022 | 3.5 | 6.29 | 2 |
| 2021 | 1.81 | 2.75 | 1.44 |
| 2020 | 2.3 | 3.05 | 1.72 |
| 2019 | 2.94 | 5.33 | 2.08 |
| 2018 | 3.5 | 5.96 | 2.18 |
| 2017 | 5.67 | 7.63 | 4.02 |
| 2016 | 579.2 | 1387.44 | 7.11 |
| 2015 | 75.77 | 118.88 | 56.12 |
| 2014 | 14.36 | 73.38 | 2.18 |
| 2013 | 2.81 | 3.53 | 2.2 |
| 2012 | 2.91 | 3.38 | 2.13 |
| 2011 | 2.6 | 3.48 | 1.76 |
| 2010 | 2.13 | 2.8 | 1.51 |
| 2009 | 1.6 | 2 | 0.98 |
| 2008 | 2.16 | 4.11 | 0.83 |
| 2007 | 2.93 | 4.26 | 1.49 |
| 2006 | 1.19 | 1.61 | 0.79 |
| 2005 | 1.01 | 1.2 | 0.78 |
| 2004 | 1.39 | 1.71 | 1.14 |
| 2003 | 1.69 | 1.98 | 1.35 |
| 2002 | 2.21 | 2.68 | 1.69 |
| 2001 | 3.34 | 4.31 | 2.59 |
| 2000 | 3.86 | 4.93 | 2.66 |
| 1999 | 2.96 | 3.63 | 2.25 |