| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | |
| 8 | 2014 | |
| 9 | 2013 | |
| 10 | 2012 | |
| 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 |
