| 年度 | 实际值 |
|---|---|
| 1993 | 14577 |
| 1994 | 15298 |
| 1995 | 15974 |
| 1996 | 15659 |
| 1997 | 15888 |
| 1998 | 15789 |
| 1999 | 15989 |
| 2000 | 14983 |
| 2001 | 15377 |
| 2002 | 12843 |
| 2003 | 15260 |
| 2004 | 15226 |
| 2005 | 14742 |
| 2006 | 15772 |
| 2007 | 15670 |
| 2008 | 16167 |
| 2009 | |
| 2010 | 17635 |
| 2011 | 17851 |
| 2012 | 18505 |
| 2013 | 18464 |
| 2014 | 18818 |
| 2015 | 20571 |
| 2016 | 21251 |
| 2017 | 21119 |
| 2018 | 24470 |