| 年度 | 实际值 |
|---|---|
| 1993 | 11458 |
| 1994 | 11845 |
| 1995 | 12177 |
| 1996 | 12313 |
| 1997 | 11867 |
| 1998 | 8779 |
| 1999 | 8926 |
| 2000 | 8989 |
| 2001 | 8969 |
| 2002 | 8467 |
| 2003 | 11691 |
| 2004 | 11964 |
| 2005 | 12592 |
| 2006 | 14948 |
| 2007 | 15533 |
| 2008 | 16070 |
| 2009 | 16845 |
| 2010 | 18249 |
| 2011 | 19514 |
| 2012 | 23194 |
| 2013 | 24296 |
| 2014 | 25352 |
| 2015 | 26197 |
| 2016 | 27667 |
| 2017 | 30300 |
| 2018 | 32852 |