| 年度 | 实际值 |
|---|---|
| 1993 | 25797 |
| 1994 | 25767 |
| 1995 | 25767 |
| 1996 | 25767 |
| 1997 | 25685 |
| 1998 | 25685 |
| 1999 | 25685 |
| 2000 | 25685 |
| 2001 | 25685 |
| 2002 | 25692 |
| 2003 | 25692 |
| 2004 | 25692 |
| 2005 | 25745 |
| 2006 | 25745 |
| 2007 | 25745 |
| 2008 | 25745 |
| 2009 | |
| 2010 | 25745 |
| 2011 | 25745 |
| 2012 | 25745 |
| 2013 | 25745 |
| 2014 | 25832 |
| 2015 | 25759 |
| 2016 | 25759 |
| 2017 | 25759 |
| 2018 | 25759 |