| 年度 | 实际值 |
|---|---|
| 1993 | 25000 |
| 1994 | 26800 |
| 1995 | 28400 |
| 1996 | 30000 |
| 1997 | 31800 |
| 1998 | 32200 |
| 1999 | |
| 2000 | 31347 |
| 2001 | 30715 |
| 2002 | 29884 |
| 2003 | 29106 |
| 2004 | 27821 |
| 2005 | 27530 |
| 2006 | 27223 |
| 2007 | 26692 |
| 2008 | 26731 |
| 2009 | 26137 |
| 2010 | 25578 |
| 2011 | 25376 |
| 2012 | 25454 |
| 2013 | 25726 |
| 2014 | 26432 |
| 2015 | 27918 |
| 2016 | 29560 |
| 2017 | 31490 |