| 年度 | 实际值 |
|---|---|
| 1993 | 1338 |
| 1994 | 1455 |
| 1995 | 1476 |
| 1996 | 1386 |
| 1997 | 1502 |
| 1998 | 1530 |
| 1999 | 1587 |
| 2000 | 1499 |
| 2001 | 1389 |
| 2002 | 2289 |
| 2003 | 2994 |
| 2004 | 1086 |
| 2005 | 1190 |
| 2006 | 1822 |
| 2007 | 1151 |
| 2008 | 1385 |
| 2009 | |
| 2010 | 1275 |
| 2011 | 1451 |
| 2012 | 1585 |
| 2013 | 1661 |
| 2014 | 1620 |
| 2015 | 1694 |
| 2016 | 1646 |
| 2017 | 1536 |
| 2018 | 1544 |