| 年度 | 实际值 |
|---|---|
| 1993 | 13231 |
| 1994 | 13600 |
| 1995 | 13873 |
| 1996 | 14066 |
| 1997 | 14291 |
| 1998 | 13762 |
| 1999 | 13846 |
| 2000 | 13814 |
| 2001 | 13736 |
| 2002 | 11653 |
| 2003 | 13788 |
| 2004 | 14375 |
| 2005 | 13997 |
| 2006 | 14801 |
| 2007 | 14119 |
| 2008 | 14821 |
| 2009 | |
| 2010 | 15873 |
| 2011 | 15941 |
| 2012 | 16878 |
| 2013 | 17487 |
| 2014 | 17914 |
| 2015 | 18724 |
| 2016 | 19485 |
| 2017 | 20301 |
| 2018 | 21721 |