| 年度 | 实际值 |
|---|---|
| 1994 | 25800 |
| 1995 | 25400 |
| 1996 | 30000 |
| 1997 | 26400 |
| 1998 | 26300 |
| 1999 | 26080 |
| 2000 | 25637 |
| 2001 | 25314 |
| 2002 | 25352 |
| 2003 | 22637 |
| 2004 | 23976 |
| 2005 | 23185 |
| 2006 | 22880 |
| 2007 | 22464 |
| 2008 | 21967 |
| 2009 | 21825 |
| 2010 | 22185 |
| 2011 | 22474 |
| 2012 | 22653 |
| 2013 | 22822 |
| 2014 | 23630 |
| 2015 | 24260 |
| 2016 | 24824 |