| 年度 | 实际值 |
|---|---|
| 1993 | 4020 |
| 1994 | 4251 |
| 1995 | 4382 |
| 1996 | 4295 |
| 1997 | 4474 |
| 1998 | 3990 |
| 1999 | 3280 |
| 2000 | 4230 |
| 2001 | 3368 |
| 2002 | 3059 |
| 2003 | 3087 |
| 2004 | 4011 |
| 2005 | 2889 |
| 2006 | 3118 |
| 2007 | 2890 |
| 2008 | 3970 |
| 2009 | |
| 2010 | 4304 |
| 2011 | 4437 |
| 2012 | 4838 |
| 2013 | 4918 |
| 2014 | 4991 |
| 2015 | 5178 |
| 2016 | 6249 |
| 2017 | 6201 |
| 2018 | 6229 |