近3年:94.6%
近5年:73.6%
近10年:75.3%
所有时间:50.2%
| 时间 | 平均 | 最高 | 最低 |
|---|---|---|---|
| 2025 | 12.48 | 14.31 | 10.2 |
| 2024 | 10.65 | 13.47 | 9.27 |
| 2023 | 11.34 | 12.92 | 9.89 |
| 2022 | 11.69 | 16.36 | 8.2 |
| 2021 | 15.92 | 17.64 | 14.08 |
| 2020 | 10.77 | 13.96 | 8.96 |
| 2019 | 10.74 | 12.07 | 9.73 |
| 2018 | 13.12 | 17.74 | 10.25 |
| 2017 | 14.29 | 16.22 | 10.93 |
| 2016 | 10.2 | 11.98 | 7.46 |
| 2015 | 10.33 | 12.12 | 8.48 |
| 2014 | 10.97 | 11.8 | 10.15 |
| 2013 | 10.94 | 11.77 | 9.58 |
| 2012 | 10.15 | 11.9 | 8.6 |
| 2011 | 12.73 | 18.09 | 8.88 |
| 2010 | 17.12 | 20.06 | 14.92 |
| 2009 | 14.65 | 20.53 | 6.74 |
| 2008 | 13.47 | 20.92 | 6.55 |
| 2007 | 17.76 | 24.37 | 14.79 |
| 2006 | 14.39 | 16.35 | 12.43 |
| 2005 | 16.56 | 19.97 | 14.72 |
| 2004 | 18.89 | 22.39 | 15.78 |
| 2003 | 16.21 | 19.82 | 12.84 |
| 2002 | 16.22 | 19.4 | 13.71 |
| 2001 | 14.85 | 19.46 | 10.28 |
| 2000 | 15.62 | 28.56 | 9.63 |
| 1999 | 20.38 | 28.13 | 11.06 |
| 1998 | 10.71 | 13.39 | 7.41 |
| 1997 | 15.98 | 19.56 | 10.52 |
| 1996 | 14.9 | 17.36 | 13.54 |
| 1995 | 13.3 | 14.38 | 11.69 |
| 1994 | 16.3 | 23.24 | 12.38 |
| 1993 | 15.61 | 22.64 | 13 |
| 1992 | 15.19 | 17.2 | 12.85 |
| 1991 | 12.14 | 13.22 | 9.83 |
| 1990 | 10.59 | 11.88 | 9.29 |
| 1989 | 11.56 | 14.85 | 8.57 |
| 1988 | 12.13 | 13.08 | 11.35 |
| 1987 | 17.54 | 22.35 | 11.28 |
| 1986 | 15.97 | 19.04 | 13.82 |
| 1985 | 16.01 | 17.59 | 13.57 |
| 1984 | 9.82 | 11.93 | 7.58 |
| 1983 | 8.02 | 9.42 | 6.75 |
| 1982 | 9.81 | 16.14 | 5.57 |
| 1981 | 18 | 21.65 | 12.92 |
| 1980 | 17.82 | 20.97 | 14.32 |
| 1979 | 13.06 | 16.68 | 11.57 |
| 1978 | 14.13 | 17.95 | 12.1 |
| 1977 | 14.1 | 15.81 | 12.36 |
| 1976 | 16.77 | 19.65 | 14.33 |
| 1975 | 12.93 | 15.75 | 9.28 |
| 1974 | 12.84 | 21.13 | 7.09 |
| 1973 | 30.73 | 43.56 | 20.21 |