| 序号 | 时间（年） | 单位：％ |
|---|---|---|
| 注：时间后面标注“E”其对应的值为系统根据历史数据预测所得，仅供参考。 | ||
| 1 | 2005 | 34.36 |
| 2 | 2004 | 33.25 |
| 3 | 2003 | 33.24 |
| 4 | 2002 | 33.30 |
| 5 | 2001 | 33.35 |
| 6 | 2000 | 33.39 |
| 7 | 1999 | 33.35 |
| 8 | 1998 | 36.24 |
| 9 | 1997 | 36.34 |
| 10 | 1996 | 36.35 |
| 11 | 1995 | 36.58 |
| 12 | 1994 | 36.56 |
| 13 | 1993 | 36.48 |
| 14 | 1992 | 36.47 |
| 15 | 1991 | 51.87 |
| 16 | 1990 | 51.91 |
| 17 | 1989 | 51.96 |
| 18 | 1988 | 52.04 |
| 19 | 1987 | 52.05 |
| 20 | 1986 | 52.11 |
| 21 | 1985 | 52.10 |
| 22 | 1984 | 52.12 |
| 23 | 1983 | 52.31 |
| 24 | 1982 | 52.50 |
| 25 | 1981 | 52.69 |
| 26 | 1980 | 52.89 |
| 27 | 1979 | 53.03 |
| 28 | 1978 | 53.27 |
| 29 | 1977 | 53.46 |
| 30 | 1976 | 53.91 |
| 31 | 1975 | 54.14 |
| 32 | 1974 | 54.39 |
| 33 | 1973 | 54.58 |
| 34 | 1972 | 54.90 |
| 35 | 1971 | 55.20 |
| 36 | 1970 | 55.44 |
| 37 | 1969 | 55.75 |
| 38 | 1968 | 55.83 |
| 39 | 1967 | 55.98 |
| 40 | 1966 | 55.98 |
| 41 | 1965 | 56.27 |
| 42 | 1964 | 56.57 |
| 43 | 1963 | 56.64 |
| 44 | 1962 | 56.72 |
| 45 | 1961 | 56.87 |
图表颜色：
图表起止时间： - （拖动下面左右滑块改变图表起始时间）
