| 年度 | 实际值 |
|---|---|
| 1992 | 38000 |
| 1993 | |
| 1994 | |
| 1995 | 54000 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 54600 |
| 2000 | 54600 |
| 2001 | 54600 |
| 2002 | 49200 |
| 2003 | 51600 |
| 2004 | 49600 |
| 2005 | 49600 |
| 2006 | 44600 |
| 2007 | 44900 |
| 2008 | 48000 |
| 2009 | 53100 |
| 2010 | 54400 |
| 2011 | 55600 |
| 2012 | 58000 |
| 2013 | 60000 |
| 2014 | 52900 |
| 2015 | 54100 |
| 2016 | 50000 |
| 2017 | 40000 |