| 年度 | 实际值 |
|---|---|
| 1993 | 1708 |
| 1994 | 1697 |
| 1995 | 2691 |
| 1996 | 1277 |
| 1997 | 1497 |
| 1998 | 1547 |
| 1999 | 1829 |
| 2000 | 1781 |
| 2001 | 1824 |
| 2002 | 1824 |
| 2003 | 1478 |
| 2004 | 1550 |
| 2005 | 1280 |
| 2006 | 1249 |
| 2007 | 1231 |
| 2008 | 1215 |
| 2009 | |
| 2010 | 2410 |
| 2011 | 3103 |
| 2012 | 2627 |
| 2013 | 2663 |
| 2014 | 2996 |
| 2015 | 2718 |
| 2016 | 3124 |
| 2017 | 3589 |
| 2018 | 3763 |