| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | |
| 8 | 2014 | |
| 9 | 2013 | |
| 10 | 2012 | |
| 11 | 2011 | 2.82 |
| 12 | 2010 | 3.23 |
| 13 | 2009 | 3.23 |
| 14 | 2008 | 3.22 |
| 15 | 2007 | 3.32 |
| 16 | 2006 | 3.41 |
| 17 | 2005 | 3.58 |
| 18 | 2004 | 3.74 |
| 19 | 2003 | 3.91 |
| 20 | 2002 | 4.38 |
| 21 | 2001 | 4.75 |
| 22 | 2000 | 4.86 |
| 23 | 1999 | 4.93 |
| 24 | 1998 | 4.85 |
| 25 | 1997 | 4.91 |
| 26 | 1996 | 4.84 |
| 27 | 1995 | 4.77 |
| 28 | 1994 | 4.90 |
| 29 | 1993 | 5.12 |
| 30 | 1992 | 5.05 |
| 31 | 1991 | 5.36 |
| 32 | 1990 | 5.55 |
| 33 | 1989 | 5.51 |
| 34 | 1988 | 5.82 |
| 35 | 1987 | 5.77 |
| 36 | 1986 | 6.08 |
| 37 | 1985 | 6.15 |
| 38 | 1984 | 6.20 |
| 39 | 1983 | 6.60 |
| 40 | 1982 | 6.42 |
| 41 | 1981 | 6.48 |
| 42 | 1980 | 6.48 |
| 43 | 1979 | 6.56 |
| 44 | 1978 | 6.24 |
| 45 | 1977 | 6.68 |
| 46 | 1976 | 6.52 |
| 47 | 1975 | 6.81 |
| 48 | 1974 | 6.91 |
| 49 | 1973 | 7.37 |
| 50 | 1972 | 7.88 |
| 51 | 1971 | 7.48 |
| 52 | 1970 | 8.04 |
| 53 | 1969 | 8.01 |
