| 年度 | 实际值 |
|---|---|
| 1992 | 37060 |
| 1993 | |
| 1994 | |
| 1995 | 31210 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 32087 |
| 2000 | 26710 |
| 2001 | 22460 |
| 2002 | 21140 |
| 2003 | 21230 |
| 2004 | 23140 |
| 2005 | 24820 |
| 2006 | 25050 |
| 2007 | 25050 |
| 2008 | 26200 |
| 2009 | 26160 |
| 2010 | 25960 |
| 2011 | 25920 |
| 2012 | 25460 |
| 2013 | 25680 |
| 2014 | 19160 |
| 2015 | 17410 |
| 2016 | 15730 |