| 年度 | 实际值 |
|---|---|
| 1992 | 26093 |
| 1993 | |
| 1994 | |
| 1995 | 27044 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 29120 |
| 2000 | 29520 |
| 2001 | 28548 |
| 2002 | 26598 |
| 2003 | 25735 |
| 2004 | 26192 |
| 2005 | 26390 |
| 2006 | 26426 |
| 2007 | 25481 |
| 2008 | 22741 |
| 2009 | 23883 |
| 2010 | 23865 |
| 2011 | 23850 |
| 2012 | 23881 |
| 2013 | 23914 |
| 2014 | 23842 |
| 2015 | 23618 |
| 2016 | 23668 |