| 年度 | 实际值 |
|---|---|
| 1992 | 23132 |
| 1993 | |
| 1994 | |
| 1995 | 9491 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 10258 |
| 2000 | 18211 |
| 2001 | 4767 |
| 2002 | 4767 |
| 2003 | 31512 |
| 2004 | 20986 |
| 2005 | 12591 |
| 2006 | 16134 |
| 2007 | 21486 |
| 2008 | 26234 |
| 2009 | 16599.8 |
| 2010 | 17103 |
| 2011 | 17558.4 |
| 2012 | 20551.47 |
| 2013 | 25278 |
| 2014 | 29727 |
| 2015 | 21742.2 |
| 2016 | 24413 |