| 年度 | 实际值 |
|---|---|
| 1994 | 1587 |
| 1995 | 1559 |
| 1996 | 1379 |
| 1997 | 1396 |
| 1998 | 1633 |
| 1999 | 2373 |
| 2000 | 3991 |
| 2001 | 6723 |
| 2002 | 9975 |
| 2003 | 12051 |
| 2004 | 14269 |
| 2005 | 16406 |
| 2006 | 18795 |
| 2007 | 21096 |
| 2008 | 23468 |
| 2009 | 24409 |
| 2010 | 24768 |
| 2011 | 25329 |
| 2012 | 26153 |
| 2013 | 26673 |
| 2014 | 26988 |
| 2015 | 32199 |
| 2016 | 26668 |