| 序号 | 时间 (年) |
数据 (人) |
|---|---|---|
| 1 | 2012 | |
| 2 | 2011 | |
| 3 | 2010 | |
| 4 | 2009 | |
| 5 | 2008 | |
| 6 | 2007 | |
| 7 | 2006 | |
| 8 | 2005 | |
| 9 | 2004 | |
| 10 | 2003 | |
| 11 | 2002 | 3.12 |
| 12 | 2001 | 3.12 |
| 13 | 2000 | 3.14 |
| 14 | 1999 | 3.16 |
| 15 | 1998 | 3.20 |
| 16 | 1997 | 3.23 |
| 17 | 1996 | 3.25 |
| 18 | 1995 | 3.29 |
| 19 | 1994 | 3.33 |
| 20 | 1993 | 3.35 |
| 21 | 1992 | 3.38 |
| 22 | 1991 | 3.49 |
| 23 | 1990 | 3.57 |
| 24 | 1989 | 3.70 |
| 25 | 1988 | 3.84 |
| 26 | 1985 | 3.99 |
| 27 | 1980 | 4.31 |
| 28 | 1978 | 4.46 |
| 29 | 1975 | 4.66 |
| 30 | 1970 | 4.77 |
| 31 | 1965 | 4.65 |
| 32 | 1962 | 4.36 |
| 33 | 1957 | 4.70 |
| 34 | 1952 | 4.51 |
| 35 | 1949 | 4.48 |
