| 年度 | 实际值 |
|---|---|
| 1993 | 1333 |
| 1994 | 1405 |
| 1995 | 1696 |
| 1996 | 803 |
| 1997 | 1580 |
| 1998 | 1705 |
| 1999 | 1528 |
| 2000 | 1048 |
| 2001 | 1476 |
| 2002 | 1108 |
| 2003 | 1898 |
| 2004 | 1342 |
| 2005 | 1612 |
| 2006 | 1628 |
| 2007 | 1315 |
| 2008 | 2638 |
| 2009 | |
| 2010 | 2963 |
| 2011 | 2406 |
| 2012 | 2570 |
| 2013 | 2588 |
| 2014 | 2680 |
| 2015 | 2757 |
| 2016 | 2743 |
| 2017 | 3095 |
| 2018 | 3424 |