| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 34.22 |
| 8 | 2014 | 33.98 |
| 9 | 2013 | 33.90 |
| 10 | 2012 | 33.89 |
| 11 | 2011 | 33.23 |
| 12 | 2010 | 32.96 |
| 13 | 2009 | 32.44 |
| 14 | 2008 | 32.42 |
| 15 | 2007 | 31.22 |
| 16 | 2006 | 29.95 |
| 17 | 2005 | 28.62 |
| 18 | 2004 | 27.42 |
| 19 | 2003 | 26.45 |
| 20 | 2002 | 25.21 |
| 21 | 2001 | 24.50 |
| 22 | 2000 | 23.64 |
| 23 | 1999 | 22.50 |
| 24 | 1998 | 21.77 |
| 25 | 1997 | 21.11 |
| 26 | 1996 | 20.80 |
| 27 | 1995 | 20.07 |
| 28 | 1994 | 19.73 |
| 29 | 1993 | 19.36 |
| 30 | 1992 | 19.14 |
| 31 | 1991 | 18.85 |
