| 年度 | 实际值 |
|---|---|
| 1993 | 15561 |
| 1994 | 15561 |
| 1995 | 15561 |
| 1996 | 15561 |
| 1997 | 15561 |
| 1998 | 15561 |
| 1999 | 21111 |
| 2000 | 21111 |
| 2001 | 21111 |
| 2002 | 21111 |
| 2003 | 21111 |
| 2004 | 21111 |
| 2005 | 21111 |
| 2006 | 21011 |
| 2007 | 21011 |
| 2008 | 20832 |
| 2009 | |
| 2010 | 21015 |
| 2011 | 21012 |
| 2012 | 21000 |
| 2013 | 21000 |
| 2014 | 21012 |
| 2015 | 18419 |
| 2016 | 21026 |
| 2017 | 21281 |
| 2018 | 21013 |