| 年度 | 实际值 |
|---|---|
| 1992 | 45789 |
| 1993 | |
| 1994 | |
| 1995 | 46912 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 49819 |
| 2000 | 49204 |
| 2001 | 49449 |
| 2002 | 44513 |
| 2003 | 42033 |
| 2004 | 42626 |
| 2005 | 45396 |
| 2006 | 45563 |
| 2007 | 33373 |
| 2008 | 35596 |
| 2009 | 34663 |
| 2010 | 35015 |
| 2011 | 35860 |
| 2012 | 36710 |
| 2013 | 35114 |
| 2014 | 35414 |
| 2015 | 30301.2 |
| 2016 | 34871 |