| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 15.03 | 16.5 | 13.09 |
| 2024 | 9.64 | 17.97 | 3.72 |
| 2023 | 4.55 | 7.35 | 2.09 |
| 2022 | 5.08 | 9.17 | 2.57 |
| 2021 | 6.52 | 7.88 | 5.94 |
| 2020 | 7.2 | 9.31 | 6.18 |
| 2019 | 5.22 | 7.38 | 2.44 |
| 2018 | 2.77 | 4.02 | 1.17 |
| 2017 | 2.19 | 2.92 | 1.75 |
| 2016 | 6.07 | 14.79 | 2.58 |
| 2015 | 9.64 | 19 | 6.24 |
| 2014 | 6.66 | 8.23 | 4.63 |
| 2013 | 45.17 | 80.57 | 5.88 |
| 2012 | 45.6 | 60.68 | 32.51 |
| 2011 | 48.37 | 50.98 | 46.74 |
| 2010 | 45.6 | 49.23 | 36.13 |
| 2009 | 29.76 | 39.02 | 16.74 |
| 2008 | 20.27 | 30.3 | 9.28 |
| 2007 | 23.14 | 30.89 | 13.29 |
| 2006 | 9.4 | 20.94 | 2.15 |
| 2005 | 3.22 | 4.42 | 2.23 |
| 2004 | 17.74 | 56.37 | 3.38 |
| 2003 | 32.99 | 58.46 | 20.93 |
| 2002 | 10.73 | 12.88 | 6.9 |
| 2001 | 13.93 | 17.81 | 8.94 |
| 2000 | 14.57 | 20.34 | 8.9 |
| 1999 | 6.76 | 9.1 | 3.24 |
| 1998 | 8.34 | 14.21 | 5.49 |
| 1997 | 6.46 | 9.29 | 3.77 |