| 年度 | 实际值 |
|---|---|
| 1993 | 3904 |
| 1994 | 3917 |
| 1995 | 3848 |
| 1996 | 3549 |
| 1997 | 3575 |
| 1998 | 3423 |
| 1999 | 3556 |
| 2000 | 2928 |
| 2001 | 3535 |
| 2002 | 3271 |
| 2003 | 3251 |
| 2004 | 3308 |
| 2005 | 3085 |
| 2006 | 3147 |
| 2007 | 3465 |
| 2008 | 3564 |
| 2009 | |
| 2010 | 3905 |
| 2011 | 3778 |
| 2012 | 3980 |
| 2013 | 2776 |
| 2014 | 2784 |
| 2015 | 2925 |
| 2016 | 3000 |
| 2017 | 4547 |
| 2018 | 4446 |