| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 2.14 | 2.43 | 1.87 |
| 2025 | 1.58 | 2.74 | 1.15 |
| 2024 | 1.21 | 1.54 | 0.99 |
| 2023 | 1.54 | 1.94 | 1.35 |
| 2022 | 1.55 | 1.93 | 1.33 |
| 2021 | 1.54 | 2.11 | 1.23 |
| 2020 | 1.3 | 1.54 | 1.18 |
| 2019 | 1.48 | 1.79 | 1.27 |
| 2018 | 1.7 | 2.18 | 1.26 |
| 2017 | 2.59 | 3.24 | 1.98 |
| 2016 | 5.53 | 11.46 | 3.14 |
| 2015 | 5.63 | 11.61 | 3.18 |
| 2014 | 2.3 | 3.18 | 1.73 |
| 2013 | 1.96 | 2.49 | 1.65 |
| 2012 | 2.09 | 2.63 | 1.77 |
| 2011 | 2.44 | 3.29 | 1.93 |
| 2010 | 2.46 | 2.87 | 2.1 |
| 2009 | 2.12 | 3 | 1.32 |
| 2008 | 2.34 | 4.52 | 1.09 |
| 2007 | 3.63 | 6.06 | 1.27 |
| 2006 | 1.19 | 1.5 | 0.86 |
| 2005 | 1 | 1.35 | 0.75 |
| 2004 | 1.63 | 2.2 | 1.28 |
| 2003 | 1.74 | 2.02 | 1.49 |
| 2002 | 2.23 | 2.58 | 1.72 |
| 2001 | 2.83 | 3.36 | 2.11 |
| 2000 | 2.89 | 4.34 | 1.97 |
| 1999 | 2.45 | 3.2 | 2.04 |
| 1998 | 2.39 | 2.76 | 2.07 |