| 年度 | 实际值 |
|---|---|
| 1993 | 15150 |
| 1994 | 14373 |
| 1995 | 14742 |
| 1996 | 15722 |
| 1997 | 16808 |
| 1998 | 20602 |
| 1999 | 20934 |
| 2000 | 20949 |
| 2001 | 16582 |
| 2002 | 18379 |
| 2003 | 18506 |
| 2004 | 17430 |
| 2005 | 17615 |
| 2006 | 18095 |
| 2007 | 19399 |
| 2008 | 20748 |
| 2009 | |
| 2010 | 22375 |
| 2011 | 26879 |
| 2012 | 29100 |
| 2013 | 31181 |
| 2014 | 32771 |
| 2015 | 37838 |