| 年度 | 实际值 |
|---|---|
| 1993 | 2107 |
| 1994 | 549 |
| 1995 | 2051 |
| 1996 | 2005 |
| 1997 | 2012 |
| 1998 | 1890 |
| 1999 | 2201 |
| 2000 | 2379 |
| 2001 | 1973 |
| 2002 | 1973 |
| 2003 | 1851 |
| 2004 | 1974 |
| 2005 | 2474 |
| 2006 | 2474 |
| 2007 | 2274 |
| 2008 | 2269 |
| 2009 | |
| 2010 | 2035 |
| 2011 | 2083 |
| 2012 | 2106 |
| 2013 | 1250 |
| 2014 | 1938 |
| 2015 | 1938 |
| 2016 | 1987 |
| 2017 | 2023 |
| 2018 | 2254 |