| 年度 | 实际值 |
|---|---|
| 1993 | 2694 |
| 1994 | 2716 |
| 1995 | 2678 |
| 1996 | 2666 |
| 1997 | 2607 |
| 1998 | 3490 |
| 1999 | 3502 |
| 2000 | 2722 |
| 2001 | 2857 |
| 2002 | 1987 |
| 2003 | 2479 |
| 2004 | 1851 |
| 2005 | 2008 |
| 2006 | 1195 |
| 2007 | 2002 |
| 2008 | 2047 |
| 2009 | |
| 2010 | 2663 |
| 2011 | 2529 |
| 2012 | 2430 |
| 2013 | 2542 |
| 2014 | 2646 |
| 2015 | 2750 |
| 2016 | 2711 |
| 2017 | 2845 |
| 2018 | 3097 |