| 序号 | 时间 (年) |
数据 (%) |
|---|---|---|
| 1 | 2023 | |
| 2 | 2022 | |
| 3 | 2021 | |
| 4 | 2020 | |
| 5 | 2019 | |
| 6 | 2018 | |
| 7 | 2017 | |
| 8 | 2016 | |
| 9 | 2015 | |
| 10 | 2014 | |
| 11 | 2013 | 17.74 |
| 12 | 2012 | 18.73 |
| 13 | 2011 | 19.57 |
| 14 | 2010 | 18.98 |
| 15 | 2009 | 18.49 |
| 16 | 2008 | 20.53 |
| 17 | 2007 | 21.08 |
| 18 | 2006 | 20.90 |
| 19 | 2005 | 20.67 |
| 20 | 2004 | 20.83 |
| 21 | 2003 | 20.27 |
| 22 | 2002 | 20.16 |
| 23 | 2001 | 20.39 |
| 24 | 2000 | 20.93 |
| 25 | 1999 | 21.63 |
| 26 | 1998 | 22.59 |
| 27 | 1997 | 23.31 |
| 28 | 1996 | 24.94 |
| 29 | 1995 | 27.66 |
| 30 | 1994 | 30.87 |
| 31 | 1993 | 32.43 |
| 32 | 1992 | 30.05 |
| 33 | 1991 | 31.77 |
| 34 | 1990 | 32.21 |
| 35 | 1989 | 32.34 |
| 36 | 1988 | 30.99 |
| 37 | 1987 | 32.69 |
| 38 | 1986 | 31.56 |
| 39 | 1985 | 30.99 |
| 40 | 1980 | 35.80 |
| 41 | 1978 | 32.21 |
| 42 | 1965 | 21.19 |
| 43 | 1950 | 3.40 |
