| 年度 | 实际值 |
|---|---|
| 1993 | 11362 |
| 1994 | 11626 |
| 1995 | 12046 |
| 1996 | 12610 |
| 1997 | 12924 |
| 1998 | 11109 |
| 1999 | 10216 |
| 2000 | 10326 |
| 2001 | 9997 |
| 2002 | 8824 |
| 2003 | 10878 |
| 2004 | 9029 |
| 2005 | 10993 |
| 2006 | 11763 |
| 2007 | 12919 |
| 2008 | 12516 |
| 2009 | 12747 |
| 2010 | 13469 |
| 2011 | 13607 |
| 2012 | 14835 |
| 2013 | 15579 |
| 2014 | 16366 |
| 2015 | 16790 |
| 2016 | 17967 |
| 2017 | 18800 |
| 2018 | 19852 |