| 年度 | 实际值 |
|---|---|
| 1993 | 1592 |
| 1994 | 1484 |
| 1995 | 1605 |
| 1996 | 1587 |
| 1997 | 1592 |
| 1998 | 1123 |
| 1999 | 1542 |
| 2000 | 1137 |
| 2001 | 3582 |
| 2002 | 1436 |
| 2003 | 1824 |
| 2004 | 1815 |
| 2005 | 1532 |
| 2006 | 1997 |
| 2007 | 1603 |
| 2008 | 1508 |
| 2009 | |
| 2010 | 1391 |
| 2011 | 2015 |
| 2012 | 2004 |
| 2013 | 1985 |
| 2014 | 1991 |
| 2015 | 2018 |
| 2016 | 2163 |
| 2017 | 2350 |
| 2018 | 2374 |