| 年度 | 实际值 |
|---|---|
| 1993 | 4007 |
| 1994 | 3911 |
| 1995 | 4059 |
| 1996 | 3061 |
| 1997 | 3068 |
| 1998 | 3042 |
| 1999 | 3225 |
| 2000 | 3233 |
| 2001 | 3250 |
| 2002 | 2371 |
| 2003 | 5967 |
| 2004 | 8361 |
| 2005 | 2883 |
| 2006 | 2403 |
| 2007 | 2869 |
| 2008 | 4898 |
| 2009 | |
| 2010 | 4949 |
| 2011 | 3715 |
| 2012 | 3827 |
| 2013 | 4116 |
| 2014 | 4298 |
| 2015 | 4521 |
| 2016 | 4832 |
| 2017 | 5045 |
| 2018 | 5484 |