| 年度 | 实际值 |
|---|---|
| 1993 | 1587 |
| 1994 | 1461 |
| 1995 | 1626 |
| 1996 | 1634 |
| 1997 | 1226 |
| 1998 | 960 |
| 1999 | 1566 |
| 2000 | 1382 |
| 2001 | 1521 |
| 2002 | 1245 |
| 2003 | 1373 |
| 2004 | 1183 |
| 2005 | 917 |
| 2006 | 1005 |
| 2007 | 969 |
| 2008 | 969 |
| 2009 | |
| 2010 | 1268 |
| 2011 | 2341 |
| 2012 | 2250 |
| 2013 | 2387 |
| 2014 | 2453 |
| 2015 | 1983 |
| 2016 | 1974 |
| 2017 | 3560 |
| 2018 | 3454 |