| 年度 | 实际值 |
|---|---|
| 1992 | 29583 |
| 1993 | |
| 1994 | |
| 1995 | 30402 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 32490 |
| 2000 | 30480 |
| 2001 | 28989 |
| 2002 | 28927 |
| 2003 | 28367 |
| 2004 | 28210 |
| 2005 | 28624 |
| 2006 | 28145 |
| 2007 | 28357 |
| 2008 | 24584 |
| 2009 | 25160 |
| 2010 | 25331 |
| 2011 | 25334 |
| 2012 | 25594 |
| 2013 | 25874 |
| 2014 | 25944 |
| 2015 | 25979 |
| 2016 | 25988 |