| 年度 | 实际值 |
|---|---|
| 1993 | 39000 |
| 1994 | 43700 |
| 1995 | 44400 |
| 1996 | 50000 |
| 1997 | 47200 |
| 1998 | 45800 |
| 1999 | |
| 2000 | 39325 |
| 2001 | 39400 |
| 2002 | 39816 |
| 2003 | 45778 |
| 2004 | 44768 |
| 2005 | 41986 |
| 2006 | 41998 |
| 2007 | 42500 |
| 2008 | 42150 |
| 2009 | 41162 |
| 2010 | 40175 |
| 2011 | 36828 |
| 2012 | 31901 |
| 2013 | 27816 |
| 2014 | 26485 |
| 2015 | 26670 |
| 2016 | 26600 |
| 2017 | 26221 |