| 年度 | 实际值 |
|---|---|
| 1992 | 1732 |
| 1993 | 2112 |
| 1994 | 2211 |
| 1995 | 2461 |
| 1996 | 2271 |
| 1997 | 2498 |
| 1998 | 2534 |
| 1999 | 2929 |
| 2000 | 9410 |
| 2001 | 12718 |
| 2002 | 13630 |
| 2003 | 11843 |
| 2004 | 14698 |
| 2005 | 13908 |
| 2006 | 14148.09 |
| 2007 | 14886.8 |
| 2008 | 10050.4 |
| 2009 | |
| 2010 | 12401.36 |
| 2011 | 13938 |
| 2012 | 15378 |
| 2013 | 13573 |
| 2014 | 8032 |