| 年度 | 实际值 |
|---|---|
| 1993 | 2501 |
| 1994 | 2621 |
| 1995 | 3011 |
| 1996 | 2783 |
| 1997 | 2778 |
| 1998 | 2906 |
| 1999 | 3183 |
| 2000 | 2661 |
| 2001 | 2831 |
| 2002 | 3168 |
| 2003 | 3101 |
| 2004 | 2812 |
| 2005 | 2387 |
| 2006 | 2980 |
| 2007 | 2901 |
| 2008 | 2512 |
| 2009 | |
| 2010 | 3568 |
| 2011 | 3563 |
| 2012 | 3325 |
| 2013 | 3893 |
| 2014 | 3974 |
| 2015 | 3795 |
| 2016 | 3862 |
| 2017 | 4058 |
| 2018 | 3987 |