| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 2.45 | 2.74 | 2.24 |
| 2024 | 2.13 | 3.56 | 1.46 |
| 2023 | 2.12 | 2.51 | 1.67 |
| 2022 | 1.32 | 2.72 | 1.02 |
| 2021 | 1.64 | 2.35 | 1.31 |
| 2020 | 2.23 | 4.52 | 1.04 |
| 2019 | 1.29 | 1.61 | 1.08 |
| 2018 | 1.31 | 1.84 | 1 |
| 2017 | 1.72 | 2.29 | 1.5 |
| 2016 | 2.69 | 3.66 | 1.67 |
| 2015 | 4.38 | 7.36 | 2.46 |
| 2014 | 2.21 | 4.94 | 1.56 |
| 2013 | 1.63 | 2.14 | 1.16 |
| 2012 | 1.55 | 1.97 | 1.22 |
| 2011 | 2.28 | 3.46 | 1.45 |
| 2010 | 3.41 | 5.02 | 2.44 |
| 2009 | 75.69 | 449.67 | 2.66 |
| 2008 | 4.96 | 9.26 | 1.98 |
| 2007 | 3.73 | 8.35 | 1.48 |
| 2006 | 1.49 | 1.78 | 1.15 |
| 2005 | 1.55 | 2.17 | 1.22 |
| 2004 | 2.62 | 3.72 | 1.97 |
| 2003 | 3.26 | 4.2 | 2.41 |
| 2002 | 5.28 | 5.94 | 4.49 |
| 2001 | 7.93 | 10.6 | 5.62 |
| 2000 | 9.27 | 11.09 | 7.93 |