| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2013 | |
| 2 | 2012 | |
| 3 | 2011 | |
| 4 | 2010 | |
| 5 | 2009 | |
| 6 | 2008 | |
| 7 | 2007 | |
| 8 | 2006 | |
| 9 | 2005 | |
| 10 | 2004 | |
| 11 | 2003 | 6.30 |
| 12 | 2002 | 5.90 |
| 13 | 2001 | 5.90 |
| 14 | 2000 | 5.80 |
| 15 | 1999 | 5.50 |
| 16 | 1998 | 5.70 |
| 17 | 1997 | 5.50 |
| 18 | 1996 | 5.00 |
| 19 | 1995 | 4.60 |
| 20 | 1994 | 5.00 |
| 21 | 1993 | 5.20 |
| 22 | 1992 | 5.00 |
| 23 | 1991 | 5.00 |
| 24 | 1990 | 4.60 |
| 25 | 1989 | 4.20 |
| 26 | 1988 | 5.50 |
| 27 | 1987 | 5.70 |
| 28 | 1986 | 5.50 |
| 29 | 1985 | 5.70 |
| 30 | 1984 | 5.30 |
| 31 | 1983 | 4.90 |
| 32 | 1982 | 5.40 |
| 33 | 1981 | 5.20 |
| 34 | 1980 | 6.10 |
| 35 | 1979 | 6.20 |
| 36 | 1978 | 6.30 |
| 37 | 1975 | 6.90 |
| 38 | 1970 | 6.20 |
| 39 | 1965 | 4.50 |
| 40 | 1962 | 12.80 |
| 41 | 1957 | 21.30 |
| 42 | 1952 | 9.60 |
