| 年度 | 实际值 |
|---|---|
| 1992 | 40920 |
| 1993 | |
| 1994 | |
| 1995 | 39760 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 40470 |
| 2000 | 37020 |
| 2001 | 33770 |
| 2002 | 32730 |
| 2003 | 32230 |
| 2004 | 31540 |
| 2005 | 32510 |
| 2006 | 32480 |
| 2007 | 32260 |
| 2008 | 29470 |
| 2009 | 30930 |
| 2010 | 31280 |
| 2011 | 31640 |
| 2012 | 31960 |
| 2013 | 31960 |
| 2014 | 29920 |
| 2015 | 29970 |
| 2016 | 30890 |