| 年度 | 实际值 |
|---|---|
| 1992 | 39084 |
| 1993 | |
| 1994 | |
| 1995 | 39689 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 41333 |
| 2000 | 40820 |
| 2001 | 39067 |
| 2002 | 39166 |
| 2003 | 36473 |
| 2004 | 37318 |
| 2005 | 36610 |
| 2006 | 35950 |
| 2007 | 30644 |
| 2008 | 28537 |
| 2009 | 28353 |
| 2010 | 28429 |
| 2011 | 26385 |
| 2012 | 26443 |
| 2013 | 26314 |
| 2014 | 26790 |
| 2015 | 27560 |
| 2016 | 26246 |