| 年度 | 实际值 |
|---|---|
| 1990 | 5702 |
| 1991 | 6899 |
| 1992 | 6384 |
| 1993 | 6036 |
| 1994 | 6006 |
| 1995 | 7875 |
| 1996 | 7755 |
| 1997 | 7152 |
| 1998 | 7591 |
| 1999 | 6556 |
| 2000 | 6622 |
| 2001 | 16120 |
| 2002 | 9937 |
| 2003 | 10164 |
| 2004 | 10266 |
| 2005 | 10285 |
| 2006 | 10611 |
| 2007 | 11995 |
| 2008 | 13656 |
| 2009 | 13801 |
| 2010 | 14949 |
| 2011 | 16601 |
| 2012 | 16725 |
| 2013 | 16621 |
| 2014 | 16674 |
| 2015 | 17600 |