| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 1.42 | 1.83 | 1.29 |
| 2024 | 1.54 | 2.07 | 1.14 |
| 2023 | 2.54 | 3.49 | 1.9 |
| 2022 | 3.75 | 6.3 | 2.61 |
| 2021 | 6.46 | 8.96 | 3.63 |
| 2020 | 6.25 | 8.12 | 5.42 |
| 2019 | 5.31 | 7.04 | 4.44 |
| 2018 | 13.39 | 21.28 | 5.01 |
| 2017 | 23.6 | 36.51 | 14.07 |
| 2016 | 33.86 | 61.09 | 27.33 |
| 2015 | 364.46 | 1133.73 | 97.92 |
| 2014 | 51.07 | 89.07 | 25.62 |
| 2013 | 28.57 | 38.42 | 18.7 |
| 2012 | 28.47 | 38.96 | 14.99 |
| 2011 | 37.05 | 75.86 | 16.12 |
| 2010 | 121.46 | 224.51 | 34.84 |
| 2009 | 18.02 | 34.7 | 8.55 |
| 2008 | 10.24 | 18.09 | 5.56 |
| 2007 | 11.09 | 19.84 | 2.24 |
| 2006 | 2.45 | 3.24 | 1.94 |
| 2005 | 1.57 | 2.12 | 1.04 |
| 2004 | 2.38 | 3.29 | 1.68 |
| 2003 | 2.14 | 2.55 | 1.75 |
| 2002 | 2.44 | 2.77 | 1.58 |
| 2001 | 3.07 | 3.94 | 2.18 |
| 2000 | 2.57 | 3.39 | 1.66 |
| 1999 | 1.65 | 2.21 | 1.16 |
| 1998 | 1.29 | 1.59 | 1.03 |
| 1997 | 1.29 | 1.85 | 0.97 |