| 年度 | 实际值 |
|---|---|
| 1993 | 1673 |
| 1994 | 1538 |
| 1995 | 1643 |
| 1996 | 2032 |
| 1997 | 2178 |
| 1998 | 2160 |
| 1999 | 2190 |
| 2000 | 2221 |
| 2001 | 1118 |
| 2002 | 805 |
| 2003 | 1340 |
| 2004 | 1578 |
| 2005 | 1477 |
| 2006 | 1495 |
| 2007 | 2187 |
| 2008 | 2413 |
| 2009 | |
| 2010 | 1375 |
| 2011 | 2123 |
| 2012 | 2251 |
| 2013 | 2364 |
| 2014 | 2387 |
| 2015 | 2381 |
| 2016 | 2616 |
| 2017 | 2624 |
| 2018 | 2603 |