| 年度 | 实际值 |
|---|---|
| 1993 | 1181 |
| 1994 | 1780 |
| 1995 | 2026 |
| 1996 | 1113 |
| 1997 | 1408 |
| 1998 | 1421 |
| 1999 | 1448 |
| 2000 | 1404 |
| 2001 | 1407 |
| 2002 | 2277 |
| 2003 | 2546 |
| 2004 | 2607 |
| 2005 | 2794 |
| 2006 | 2974 |
| 2007 | 3065 |
| 2008 | 3155 |
| 2009 | |
| 2010 | 3404 |
| 2011 | 1893 |
| 2012 | 3882 |
| 2013 | 4069 |
| 2014 | 3959 |
| 2015 | 4754 |
| 2016 | 4948 |
| 2017 | 5184 |
| 2018 | 5344 |