| 年度 | 实际值 |
|---|---|
| 1993 | 509 |
| 1994 | 508 |
| 1995 | 509 |
| 1996 | 509 |
| 1997 | |
| 1998 | |
| 1999 | 509 |
| 2000 | 25271 |
| 2001 | 25259 |
| 2002 | 25259 |
| 2003 | 25259 |
| 2004 | 25259 |
| 2005 | 25259 |
| 2006 | 24922 |
| 2007 | 24922 |
| 2008 | 24922 |
| 2009 | |
| 2010 | 25283 |
| 2011 | 25372 |
| 2012 | 25372 |
| 2013 | 25283 |
| 2014 | 25283 |
| 2015 | 25373 |
| 2016 | 25373 |
| 2017 | 25372 |
| 2018 | 25372 |