| 序号 | 时间 (年) |
数据 (人) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 11.86 |
| 8 | 2014 | 11.79 |
| 9 | 2013 | 11.08 |
| 10 | 2012 | 12.18 |
| 11 | 2011 | 12.43 |
| 12 | 2010 | 13.08 |
| 13 | 2009 | 14.06 |
| 14 | 2008 | 14.95 |
| 15 | 2007 | 15.52 |
| 16 | 2006 | 16.41 |
| 17 | 2005 | 17.34 |
| 18 | 2004 | 18.07 |
| 19 | 2003 | 18.20 |
| 20 | 2002 | 18.34 |
| 21 | 2001 | 18.93 |
| 22 | 2000 | 19.35 |
| 23 | 1999 | 19.45 |
| 24 | 1998 | 19.65 |
| 25 | 1997 | 19.70 |
| 26 | 1996 | 18.45 |
| 27 | 1995 | 17.04 |
| 28 | 1990 | 14.83 |
| 29 | 1985 | 19.82 |
| 30 | 1980 | 19.15 |
| 31 | 1978 | 21.99 |
| 32 | 1975 | 22.88 |
| 33 | 1970 | 20.70 |
| 34 | 1965 | 19.27 |
| 35 | 1962 | 17.64 |
| 36 | 1957 | 24.94 |
| 37 | 1952 | 23.19 |
