| 年度 | 实际值 |
|---|---|
| 1993 | 23638 |
| 1994 | 24376 |
| 1995 | 24861 |
| 1996 | 23410 |
| 1997 | 24740 |
| 1998 | 23939 |
| 1999 | 24211 |
| 2000 | 24326 |
| 2001 | 23563 |
| 2002 | 19696 |
| 2003 | 19765 |
| 2004 | 19634 |
| 2005 | 20040 |
| 2006 | 21145 |
| 2007 | 21541 |
| 2008 | 22728 |
| 2009 | |
| 2010 | 25069 |
| 2011 | 25376 |
| 2012 | 26420 |
| 2013 | 27767 |
| 2014 | 29523 |
| 2015 | 32888 |
| 2016 | 34730 |
| 2017 | 36266 |
| 2018 | 42271 |