| 年度 | 实际值 |
|---|---|
| 1993 | 3298 |
| 1994 | 3575 |
| 1995 | 4209 |
| 1996 | 4484 |
| 1997 | 4664 |
| 1998 | 5168 |
| 1999 | 5269 |
| 2000 | |
| 2001 | |
| 2002 | |
| 2003 | 6003 |
| 2004 | 12591 |
| 2005 | 13121 |
| 2006 | 13654 |
| 2007 | 17530 |
| 2008 | 6402 |
| 2009 | |
| 2010 | 20053 |
| 2011 | 21022 |
| 2012 | 21576 |
| 2013 | 22172 |
| 2014 | 22355 |
| 2015 | 22410 |
| 2016 | 22456 |
| 2017 | 13310 |
| 2018 | 13441 |