| 年度 | 实际值 |
|---|---|
| 1993 | 1798 |
| 1994 | 1798 |
| 1995 | 22113 |
| 1996 | 22113 |
| 1997 | 22113 |
| 1998 | 22089 |
| 1999 | 22089 |
| 2000 | 22092 |
| 2001 | 22109 |
| 2002 | 22109 |
| 2003 | 20584 |
| 2004 | 20584 |
| 2005 | 20584 |
| 2006 | 20584 |
| 2007 | 20584 |
| 2008 | 20584 |
| 2009 | |
| 2010 | 20584 |
| 2011 | 22185 |
| 2012 | 22185 |
| 2013 | 20900 |
| 2014 | 22185 |
| 2015 | 22185 |
| 2016 | 22185 |
| 2017 | 22185 |
| 2018 | 22185 |