| 年度 | 实际值 |
|---|---|
| 1993 | 2306 |
| 1994 | 2309 |
| 1995 | 2303 |
| 1996 | 2122 |
| 1997 | 2183 |
| 1998 | 2186 |
| 1999 | 2169 |
| 2000 | 1914 |
| 2001 | 1894 |
| 2002 | 1964 |
| 2003 | 1559 |
| 2004 | 1698 |
| 2005 | 1813 |
| 2006 | 1732 |
| 2007 | 2055 |
| 2008 | 2269 |
| 2009 | |
| 2010 | 1314 |
| 2011 | 2460 |
| 2012 | 2583 |
| 2013 | 2756 |
| 2014 | 2924 |
| 2015 | 3352 |
| 2016 | 4783 |
| 2017 | 3147 |
| 2018 | 6043 |