| 年度 | 实际值 |
|---|---|
| 1992 | 15580 |
| 1993 | |
| 1994 | |
| 1995 | 15882 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 16010 |
| 2000 | 16730 |
| 2001 | 17140 |
| 2002 | 16768 |
| 2003 | 15158 |
| 2004 | 14007 |
| 2005 | 14112 |
| 2006 | 14306 |
| 2007 | 14068 |
| 2008 | 12652 |
| 2009 | 13602 |
| 2010 | 13706 |
| 2011 | 13478 |
| 2012 | 13557 |
| 2013 | 14062 |
| 2014 | 14048 |
| 2015 | 14739.06 |
| 2016 | 14087 |