| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2026 | 19.42 | 24.06 | 16.62 |
| 2025 | 13.66 | 18.78 | 10.28 |
| 2024 | 10.13 | 17.44 | 6.76 |
| 2023 | 10.36 | 14.01 | 8.64 |
| 2022 | 13.45 | 16.66 | 10.95 |
| 2021 | 10.41 | 17.82 | 5.67 |
| 2020 | 8.77 | 10.86 | 6.58 |
| 2019 | 12.07 | 15.81 | 9.69 |
| 2018 | 11.13 | 14.69 | 8.58 |
| 2017 | 25.9 | 36.63 | 12.88 |
| 2016 | 0 | -1.24 | |
| 2015 | 22.41 | 64.42 | 3.8 |
| 2014 | 2.25 | 4.08 | 1.42 |
| 2013 | 1.75 | 2.22 | 1.29 |
| 2012 | 1.3 | 1.58 | 1.07 |
| 2011 | 2.06 | 2.81 | 1.21 |
| 2010 | 2.82 | 5.47 | 1.81 |
| 2009 | 3.07 | 4.82 | 1.78 |
| 2008 | 4.7 | 8.32 | 1.33 |
| 2007 | 8.24 | 22.19 | 2.37 |
| 2006 | 1.84 | 2.54 | 1.37 |
| 2005 | 1.8 | 3.14 | 1.27 |
| 2004 | 1.98 | 2.85 | 1.48 |
| 2003 | 2.96 | 3.57 | 2.19 |
| 2002 | 3.9 | 4.67 | 3.33 |
| 2001 | 4.8 | 6.14 | 3.49 |
| 2000 | 4.4 | 5.3 | 2.97 |
| 1999 | 3.08 | 3.92 | 2.28 |
| 1998 | 3.7 | 5.27 | 2.71 |
| 1997 | 5.11 | 8.33 | 3 |