| 序号 |
时间(年) |
数据(单位：%) |
| 1 |
2018 |
|
| 2 |
2017 |
|
| 3 |
2016 |
|
| 4 |
2015 |
|
| 5 |
2014 |
|
| 6 |
2013 |
|
| 7 |
2012 |
47.50 |
| 8 |
2011 |
49.45 |
| 9 |
2010 |
48.24 |
| 10 |
2009 |
46.89 |
| 11 |
2008 |
44.73 |
| 12 |
2007 |
44.59 |
| 13 |
2006 |
43.38 |
| 14 |
2005 |
42.43 |
| 15 |
2004 |
40.58 |
| 16 |
2003 |
37.98 |
| 17 |
2002 |
34.42 |
| 18 |
2001 |
32.90 |
| 19 |
2000 |
32.39 |
| 20 |
1999 |
32.19 |
| 21 |
1998 |
31.00 |
| 22 |
1997 |
31.52 |
| 23 |
1996 |
31.66 |
| 24 |
1995 |
31.31 |
| 25 |
1994 |
29.35 |
| 26 |
1993 |
27.99 |
| 27 |
1992 |
26.44 |
| 28 |
1991 |
25.66 |
| 29 |
1990 |
24.74 |
| 30 |
1989 |
23.52 |
| 31 |
1988 |
22.25 |
| 32 |
1987 |
21.57 |
| 33 |
1986 |
21.17 |
| 34 |
1985 |
21.14 |
| 35 |
1984 |
19.87 |
| 36 |
1983 |
18.81 |
| 37 |
1982 |
17.42 |
| 38 |
1981 |
16.78 |
