| 年份 | 单位：户 |
| 2012 | 购买后可见 » |
| 2011 | 购买后可见 » |
| 2010 | 购买后可见 » |
| 2009 | 购买后可见 » |
| 2008 | 购买后可见 » |
| 2007 | 购买后可见 » |
| 2006 | 购买后可见 » |
| 2005 | 购买后可见 » |
| 2004 | 购买后可见 » |
| 2003 | 购买后可见 » |
| 2002 | 45317.00 |
| 2001 | 43840.00 |
| 2000 | 42220.00 |
| 1999 | 40044.00 |
| 1998 | 39080.00 |
| 1997 | 37890.00 |
| 1996 | 36370.00 |
| 1995 | 35520.00 |
| 1994 | 34940.00 |
| 1993 | 35390.00 |
| 1992 | 36290.00 |
| 1991 | 36730.00 |
| 1990 | 35660.00 |
| 1985 | 24338.00 |
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