| 序号 | 时间 (年) |
数据 (人) |
|---|---|---|
| 1 | 2021 | |
| 2 | 2020 | |
| 3 | 2019 | |
| 4 | 2018 | |
| 5 | 2017 | |
| 6 | 2016 | |
| 7 | 2015 | 23.72 |
| 8 | 2014 | 22.43 |
| 9 | 2013 | 21.40 |
| 10 | 2012 | 19.90 |
| 11 | 2011 | 17.10 |
| 12 | 2010 | 16.40 |
| 13 | 2009 | 15.90 |
| 14 | 2008 | 15.60 |
| 15 | 2007 | 16.10 |
| 16 | 2006 | 15.70 |
| 17 | 2005 | 15.00 |
| 18 | 2004 | 14.70 |
| 19 | 2003 | 14.52 |
| 20 | 2002 | 14.34 |
| 21 | 2001 | 16.15 |
| 22 | 2000 | 15.61 |
| 23 | 1995 | 15.90 |
| 24 | 1990 | 14.60 |
| 25 | 1985 | 12.30 |
| 26 | 1980 | 10.20 |
| 27 | 1978 | 9.70 |
