| 年度 | 实际值 |
|---|---|
| 1993 | 236 |
| 1994 | 236 |
| 1995 | 245 |
| 1996 | 245 |
| 1997 | 236 |
| 1998 | 236 |
| 1999 | 236 |
| 2000 | 236 |
| 2001 | 236 |
| 2002 | 236 |
| 2003 | 2305 |
| 2004 | 2305 |
| 2005 | 2305 |
| 2006 | 2305 |
| 2007 | 2305 |
| 2008 | 2304 |
| 2009 | |
| 2010 | 2305 |
| 2011 | 2305 |
| 2012 | 2305 |
| 2013 | 2305 |
| 2014 | 2284 |
| 2015 | 2304 |
| 2016 | 2304 |
| 2017 | 2289 |
| 2018 | 2289 |