| 年度 | 实际值 |
|---|---|
| 1994 | 1636 |
| 1995 | 1579 |
| 1996 | 1373 |
| 1997 | 1584 |
| 1998 | 1842 |
| 1999 | 1936 |
| 2000 | 2108 |
| 2001 | 2079 |
| 2002 | 1952 |
| 2003 | 2088 |
| 2004 | 1945 |
| 2005 | 1919 |
| 2006 | 1919 |
| 2007 | 1267 |
| 2008 | 2134 |
| 2009 | |
| 2010 | 2588 |
| 2011 | 3787 |
| 2012 | 3829 |
| 2013 | 3869 |
| 2014 | 3971 |
| 2015 | 4189 |
| 2016 | 4320 |
| 2017 | 4397 |
| 2018 | 4625 |