| 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 | 2010 | 49.89 |
| 2 | 2009 | 37.82 |
| 3 | 2008 | 38.58 |
| 4 | 2007 | 41.11 |
| 5 | 2006 | 40.35 |
| 6 | 2005 | 67.66 |
| 7 | 2004 | 67.63 |
| 8 | 2003 | 71.35 |
| 9 | 2002 | 72.17 |
| 10 | 2001 | 77.44 |
| 11 | 2000 | 76.36 |
| 12 | 1999 | 68.38 |
| 13 | 1998 | 57.05 |
| 14 | 1997 | 65.13 |
| 15 | 1996 | 68.23 |
| 16 | 1995 | 62.53 |
| 17 | 1994 | 2.50 |
| 18 | 1993 | 3.36 |
| 19 | 1992 | 69.59 |
| 20 | 1991 | 3.17 |
| 21 | 1990 | 45.17 |
| 22 | 1989 | 39.16 |
| 23 | 1988 | 2.13 |
| 24 | 1987 | 51.81 |
| 25 | 1986 | 42.03 |
| 26 | 1985 | 74.05 |
| 27 | 1984 | 63.06 |
| 28 | 1983 | 68.85 |
| 29 | 1982 | 74.70 |
| 30 | 1981 | 79.01 |
| 31 | 1980 | 78.86 |
| 32 | 1979 | 72.13 |
| 33 | 1978 | 62.80 |
| 34 | 1977 | 60.58 |
| 35 | 1976 | 64.70 |
| 36 | 1975 | 70.31 |
| 37 | 1974 | 55.18 |
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）
