| 年度 | 实际值 |
|---|---|
| 1993 | 2311 |
| 1994 | 2138 |
| 1995 | 2154 |
| 1996 | 2045 |
| 1997 | 2049 |
| 1998 | 1470 |
| 1999 | 2188 |
| 2000 | 1285 |
| 2001 | 4611 |
| 2002 | 1736 |
| 2003 | 1992 |
| 2004 | 2031 |
| 2005 | 1707 |
| 2006 | 2170 |
| 2007 | 1673 |
| 2008 | 1619 |
| 2009 | |
| 2010 | 1186 |
| 2011 | 2156 |
| 2012 | 2155 |
| 2013 | 2142 |
| 2014 | 2120 |
| 2015 | 2158 |
| 2016 | 2321 |
| 2017 | 2505 |
| 2018 | 2534 |