| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2014 | |
| 2 | 2013 | |
| 3 | 2012 | |
| 4 | 2008 | |
| 5 | 2007 | |
| 6 | 2006 | |
| 7 | 2005 | |
| 8 | 2004 | |
| 9 | 2003 | |
| 10 | 2002 | |
| 11 | 2001 | 2.41 |
| 12 | 2000 | 3.15 |
| 13 | 1999 | 3.78 |
| 14 | 1998 | 5.30 |
| 15 | 1997 | 4.08 |
| 16 | 1982 | 2.24 |
| 17 | 1981 | 1.76 |
| 18 | 1980 | 2.92 |
| 19 | 1979 | 3.22 |
| 20 | 1978 | 3.80 |
| 21 | 1977 | 2.46 |
| 22 | 1976 | 1.97 |
| 23 | 1975 | 2.25 |
| 24 | 1974 | 3.29 |
| 25 | 1973 | 3.98 |
| 26 | 1972 | 3.71 |
| 27 | 1971 | 5.32 |
| 28 | 1970 | 6.07 |
| 29 | 1969 | 3.76 |
| 30 | 1968 | 2.86 |
| 31 | 1967 | 3.36 |
| 32 | 1966 | 2.91 |
| 33 | 1965 | 1.86 |
| 34 | 1964 | 1.84 |
| 35 | 1963 | 2.41 |
| 36 | 1962 | 3.10 |
| 37 | 1961 | 1.86 |
| 38 | 1960 | 1.59 |
