| 年度 | 实际值 |
|---|---|
| 1993 | 1461 |
| 1994 | 1501 |
| 1995 | 1539 |
| 1996 | 1372 |
| 1997 | 1579 |
| 1998 | 1671 |
| 1999 | 1876 |
| 2000 | 1985 |
| 2001 | 1950 |
| 2002 | 1806 |
| 2003 | 1710 |
| 2004 | 1645 |
| 2005 | 1704 |
| 2006 | 1675 |
| 2007 | 1721 |
| 2008 | 2340 |
| 2009 | |
| 2010 | 1878 |
| 2011 | 3512 |
| 2012 | 1908 |
| 2013 | 1730 |
| 2014 | 1776 |
| 2015 | 2359 |
| 2016 | 2191 |
| 2017 | 2236 |
| 2018 | 2219 |