| 年度 | 实际值 |
|---|---|
| 1993 | 2172 |
| 1994 | 2239 |
| 1995 | 2325 |
| 1996 | 2412 |
| 1997 | 2183 |
| 1998 | 2178 |
| 1999 | 1910 |
| 2000 | 2222 |
| 2001 | 2252 |
| 2002 | 2068 |
| 2003 | 2133 |
| 2004 | 2082 |
| 2005 | 2112 |
| 2006 | 2481 |
| 2007 | 2461 |
| 2008 | 2355 |
| 2009 | |
| 2010 | 3100 |
| 2011 | 2793 |
| 2012 | 2761 |
| 2013 | 2810 |
| 2014 | 2954 |
| 2015 | 1999 |
| 2016 | 2776 |
| 2017 | 2820 |
| 2018 | 2935 |