| 年度 | 实际值 |
|---|---|
| 1992 | 12030 |
| 1993 | 12729 |
| 1994 | 12967 |
| 1995 | 13188 |
| 1996 | 13874 |
| 1997 | 14550 |
| 1998 | 14822 |
| 1999 | 15412 |
| 2000 | 15220 |
| 2001 | 15156 |
| 2002 | 14428 |
| 2003 | 14636 |
| 2004 | 15037 |
| 2005 | 15852 |
| 2006 | 17552 |
| 2007 | 19092.3 |
| 2008 | 20731.7 |
| 2009 | |
| 2010 | 17347.5 |
| 2011 | 19405 |
| 2012 | 21719 |
| 2013 | 21491 |
| 2014 | 23488 |