| 年度 | 实际值 |
|---|---|
| 1992 | 45120 |
| 1993 | |
| 1994 | |
| 1995 | 40770 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 40219 |
| 2000 | 38000 |
| 2001 | 36390 |
| 2002 | 35390 |
| 2003 | 34000 |
| 2004 | 35100 |
| 2005 | 35900 |
| 2006 | 36530 |
| 2007 | 36210 |
| 2008 | 37300 |
| 2009 | 34190 |
| 2010 | 34460 |
| 2011 | 34110 |
| 2012 | 33790 |
| 2013 | 32920 |
| 2014 | 24720 |
| 2015 | 24940 |
| 2016 | 24420 |