| 年度 | 实际值 |
|---|---|
| 1992 | 38340 |
| 1993 | |
| 1994 | |
| 1995 | 37280 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 37463 |
| 2000 | 36330 |
| 2001 | 32060 |
| 2002 | 29470 |
| 2003 | 26010 |
| 2004 | 27720 |
| 2005 | 27450 |
| 2006 | 27010 |
| 2007 | 27410 |
| 2008 | 28380 |
| 2009 | 27100 |
| 2010 | 26990 |
| 2011 | 23640 |
| 2012 | 23600 |
| 2013 | 23840 |
| 2014 | 12430 |
| 2015 | 13340 |
| 2016 | 13090 |