| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 20.56 |
| 8 | 2014 | 20.27 |
| 9 | 2013 | 19.82 |
| 10 | 2012 | 19.38 |
| 11 | 2011 | 18.96 |
| 12 | 2010 | 18.72 |
| 13 | 2009 | 18.64 |
| 14 | 2008 | 18.92 |
| 15 | 2007 | 18.92 |
| 16 | 2006 | 18.44 |
| 17 | 2005 | 18.01 |
| 18 | 2004 | 17.41 |
| 19 | 2003 | 16.96 |
| 20 | 2002 | 16.28 |
| 21 | 2001 | 16.34 |
| 22 | 2000 | 16.21 |
| 23 | 1999 | 16.12 |
| 24 | 1998 | 16.22 |
| 25 | 1997 | 16.44 |
| 26 | 1996 | 16.59 |
| 27 | 1995 | 16.77 |
| 28 | 1994 | 17.06 |
| 29 | 1993 | 17.39 |
| 30 | 1992 | 17.72 |
| 31 | 1991 | 17.97 |
