| 年度 | 实际值 |
|---|---|
| 1993 | 4192 |
| 1994 | 4185 |
| 1995 | 4161 |
| 1996 | 4067 |
| 1997 | 4038 |
| 1998 | 4014 |
| 1999 | 4044 |
| 2000 | 3941 |
| 2001 | 3943 |
| 2002 | 2769 |
| 2003 | 3134 |
| 2004 | 3199 |
| 2005 | 3270 |
| 2006 | 3017 |
| 2007 | 3227 |
| 2008 | 2557 |
| 2009 | |
| 2010 | 2643 |
| 2011 | 2825 |
| 2012 | 2867 |
| 2013 | 2925 |
| 2014 | 3096 |
| 2015 | 3353 |
| 2016 | 4751 |
| 2017 | 4902 |
| 2018 | 5127 |