| 年度 | 实际值 |
|---|---|
| 1993 | 1339 |
| 1994 | 1322 |
| 1995 | 1344 |
| 1996 | 1263 |
| 1997 | 1120 |
| 1998 | 813 |
| 1999 | 1100 |
| 2000 | 1141 |
| 2001 | 1094 |
| 2002 | 945 |
| 2003 | 911 |
| 2004 | 945 |
| 2005 | 1375 |
| 2006 | 1552 |
| 2007 | 1490 |
| 2008 | 2731 |
| 2009 | |
| 2010 | 1445 |
| 2011 | 1760 |
| 2012 | 1842 |
| 2013 | 1707 |
| 2014 | 1844 |
| 2015 | 2056 |
| 2016 | 1889 |
| 2017 | 2137 |
| 2018 | 2227 |