| 序号 |
时间(年) |
数据(单位：%) |
| 1 |
2018 |
|
| 2 |
2017 |
|
| 3 |
2016 |
|
| 4 |
2015 |
|
| 5 |
2014 |
|
| 6 |
2013 |
|
| 7 |
2012 |
20.40 |
| 8 |
2011 |
20.05 |
| 9 |
2010 |
19.18 |
| 10 |
2009 |
19.97 |
| 11 |
2008 |
18.97 |
| 12 |
2007 |
18.82 |
| 13 |
2006 |
18.51 |
| 14 |
2005 |
18.70 |
| 15 |
2004 |
19.81 |
| 16 |
2003 |
20.94 |
| 17 |
2002 |
21.54 |
| 18 |
2001 |
22.71 |
| 19 |
2000 |
22.76 |
| 20 |
1999 |
23.15 |
| 21 |
1998 |
24.10 |
| 22 |
1997 |
24.38 |
| 23 |
1996 |
24.37 |
| 24 |
1995 |
25.17 |
| 25 |
1994 |
25.89 |
| 26 |
1993 |
25.20 |
| 27 |
1992 |
25.38 |
| 28 |
1991 |
25.38 |
| 29 |
1990 |
25.80 |
| 30 |
1989 |
25.86 |
| 31 |
1988 |
26.32 |
| 32 |
1987 |
26.82 |
| 33 |
1986 |
27.16 |
| 34 |
1985 |
28.67 |
| 35 |
1984 |
31.41 |
| 36 |
1983 |
31.53 |
| 37 |
1982 |
34.96 |
| 38 |
1981 |
37.64 |
| 39 |
1980 |
38.65 |
| 40 |
1979 |
39.24 |
| 41 |
1978 |
40.63 |
| 42 |
1977 |
42.20 |
| 43 |
1976 |
43.71 |
| 44 |
1975 |
45.83 |
| 45 |
1974 |
49.50 |
| 46 |
1973 |
52.81 |
| 47 |
1972 |
55.16 |
| 48 |
1971 |
57.85 |
| 49 |
1970 |
59.88 |
