| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 11.86 | 13.22 | 10.52 |
| 2024 | 11.62 | 15.61 | 10.09 |
| 2023 | 5.95 | 14.03 | 1.51 |
| 2022 | 11.46 | 12.05 | 10.65 |
| 2021 | 11.71 | 13.14 | 10.1 |
| 2020 | 13.92 | 16.66 | 11.74 |
| 2019 | 26.37 | 47.25 | 14.31 |
| 2018 | 25.69 | 31.47 | 20.23 |
| 2017 | 28.17 | 41.48 | 22.04 |
| 2016 | 68.68 | 182.31 | 28.96 |
| 2015 | 644.89 | 1250.65 | 140.25 |
| 2014 | 302.44 | 1180.01 | 132.68 |
| 2013 | 146.55 | 199.98 | 121.39 |
| 2012 | 185.8 | 243.11 | 131 |
| 2011 | 593.21 | 2091.33 | 107.55 |
| 2010 | 892.19 | 2154.89 | 210.27 |
| 2009 | 172.82 | 225.87 | 101.53 |
| 2008 | 154.78 | 321.52 | 56.34 |
| 2007 | 540.37 | 1751.42 | 213.71 |
| 2006 | 344.74 | 920.4 | 57.81 |
| 2005 | 14.45 | 57.13 | 1.34 |
| 2004 | 9.43 | 16.86 | 3.01 |
| 2003 | 4.49 | 5.14 | 3.31 |
| 2002 | 5.89 | 8.24 | 3.93 |
| 2001 | 0 | -0.17 | |
| 2000 | 0 | -0.09 | |
| 1999 | 7.05 | 14.94 | 4.8 |
| 1998 | 0.17 | 0.22 | 0.11 |
| 1997 | 0.35 | 0.47 | 0.23 |