| 年度 | 实际值 |
|---|---|
| 1993 | 9695 |
| 1994 | 10065 |
| 1995 | 10075 |
| 1996 | 9845 |
| 1997 | 9102 |
| 1998 | 7855 |
| 1999 | 7995 |
| 2000 | 8027 |
| 2001 | 7906 |
| 2002 | 7293 |
| 2003 | 9004 |
| 2004 | 9049 |
| 2005 | 9076 |
| 2006 | 9160 |
| 2007 | 9243 |
| 2008 | 9008 |
| 2009 | 9197 |
| 2010 | 9244 |
| 2011 | 9903 |
| 2012 | 13945 |
| 2013 | 15008 |
| 2014 | 16233 |
| 2015 | 17767 |
| 2016 | 18124 |
| 2017 | 18200 |
| 2018 | 18753 |