| 年度 | 实际值 |
|---|---|
| 1993 | 2534 |
| 1994 | 1668 |
| 1995 | 2623 |
| 1996 | 2446 |
| 1997 | 2303 |
| 1998 | 2734 |
| 1999 | 2089 |
| 2000 | 2346 |
| 2001 | 2340 |
| 2002 | 1744 |
| 2003 | 2338 |
| 2004 | 2405 |
| 2005 | 2458 |
| 2006 | 2704 |
| 2007 | 2245 |
| 2008 | 2298 |
| 2009 | |
| 2010 | 2628 |
| 2011 | 3077 |
| 2012 | 3194 |
| 2013 | 3384 |
| 2014 | 3393 |
| 2015 | 3466 |
| 2016 | 3421 |
| 2017 | 3626 |
| 2018 | 3745 |