| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 35.16 |
| 8 | 2014 | 35.22 |
| 9 | 2013 | 35.11 |
| 10 | 2012 | 35.08 |
| 11 | 2011 | 35.24 |
| 12 | 2010 | 35.72 |
| 13 | 2009 | 34.53 |
| 14 | 2008 | 34.38 |
| 15 | 2007 | 33.22 |
| 16 | 2006 | 32.13 |
| 17 | 2005 | 30.93 |
| 18 | 2004 | 29.94 |
| 19 | 2003 | 29.13 |
| 20 | 2002 | 28.74 |
| 21 | 2001 | 28.57 |
| 22 | 2000 | 28.46 |
| 23 | 1999 | 28.14 |
| 24 | 1998 | 28.05 |
| 25 | 1997 | 28.13 |
| 26 | 1996 | 28.25 |
| 27 | 1995 | 28.38 |
| 28 | 1994 | 28.48 |
| 29 | 1993 | 28.66 |
| 30 | 1992 | 28.52 |
| 31 | 1991 | 28.53 |
| 32 | 1982 | 34.23 |
| 33 | 1981 | 34.68 |
| 34 | 1979 | 39.23 |
