| 年度 | 实际值 |
|---|---|
| 1992 | 40324 |
| 1993 | |
| 1994 | |
| 1995 | 43107 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 46603 |
| 2000 | 45160 |
| 2001 | 45659 |
| 2002 | 42112 |
| 2003 | 37093 |
| 2004 | 37435 |
| 2005 | 35487 |
| 2006 | 29908 |
| 2007 | 25080 |
| 2008 | 15433 |
| 2009 | 16150 |
| 2010 | 15814 |
| 2011 | 15843 |
| 2012 | 15777 |
| 2013 | 15883 |
| 2014 | 15960 |
| 2015 | 15560 |
| 2016 | 15805 |