| 序号 |
时间(年) |
数据(单位：%) |
| 1 |
2021 |
|
| 2 |
2020 |
|
| 3 |
2019 |
|
| 4 |
2018 |
|
| 5 |
2017 |
|
| 6 |
2016 |
|
| 7 |
2015 |
18.11 |
| 8 |
2014 |
18.76 |
| 9 |
2013 |
19.59 |
| 10 |
2012 |
20.97 |
| 11 |
2011 |
21.59 |
| 12 |
2010 |
20.78 |
| 13 |
2009 |
20.91 |
| 14 |
2008 |
18.69 |
| 15 |
2007 |
18.02 |
| 16 |
2006 |
18.86 |
| 17 |
2005 |
19.99 |
| 18 |
2004 |
19.13 |
| 19 |
2003 |
18.24 |
| 20 |
2002 |
19.75 |
| 21 |
2001 |
21.81 |
| 22 |
2000 |
21.62 |
| 23 |
1999 |
22.14 |
| 24 |
1998 |
25.08 |
| 25 |
1997 |
25.72 |
| 26 |
1996 |
26.08 |
| 27 |
1995 |
26.55 |
| 28 |
1994 |
26.99 |
| 29 |
1993 |
27.27 |
| 30 |
1992 |
27.48 |
| 31 |
1991 |
27.76 |
| 32 |
1990 |
7.45 |
| 33 |
1989 |
10.23 |
| 34 |
1988 |
8.07 |
| 35 |
1986 |
1.56 |
| 36 |
1985 |
34.12 |
| 37 |
1980 |
37.47 |
| 38 |
1979 |
42.69 |
| 39 |
1978 |
41.21 |
| 40 |
1975 |
48.02 |
