| 年度 | 实际值 |
|---|---|
| 1993 | 2199 |
| 1994 | |
| 1995 | 2200 |
| 1996 | 2056 |
| 1997 | 2141 |
| 1998 | 2138 |
| 1999 | 2176 |
| 2000 | 2106 |
| 2001 | 2226 |
| 2002 | 1748 |
| 2003 | 2229 |
| 2004 | 2325 |
| 2005 | 2283 |
| 2006 | 2236 |
| 2007 | 2307 |
| 2008 | 2969 |
| 2009 | |
| 2010 | 2670 |
| 2011 | 6305 |
| 2012 | 3639 |
| 2013 | 3919 |
| 2014 | 4107 |
| 2015 | 4362 |
| 2016 | 4402 |
| 2017 | 4756 |
| 2018 | 5045 |