| 年度 | 实际值 |
|---|---|
| 1992 | 33596 |
| 1993 | |
| 1994 | |
| 1995 | 32008 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 35554 |
| 2000 | 34602 |
| 2001 | 33283 |
| 2002 | 26200 |
| 2003 | 25931 |
| 2004 | 33594 |
| 2005 | 36743 |
| 2006 | 38919 |
| 2007 | 31546 |
| 2008 | 33751 |
| 2009 | 37528 |
| 2010 | 35591 |
| 2011 | 26122 |
| 2012 | 28714 |
| 2013 | 22025 |
| 2014 | 22389 |
| 2015 | 23637 |
| 2016 | 23282 |