| 年度 | 实际值 |
|---|---|
| 1993 | 2265 |
| 1994 | 2231 |
| 1995 | 2427 |
| 1996 | 2363 |
| 1997 | 2443 |
| 1998 | 1714 |
| 1999 | 1687 |
| 2000 | 1145 |
| 2001 | 1417 |
| 2002 | 1427 |
| 2003 | 1466 |
| 2004 | 1549 |
| 2005 | 1572 |
| 2006 | 1917 |
| 2007 | 1998 |
| 2008 | 1716 |
| 2009 | |
| 2010 | 1789 |
| 2011 | 1829 |
| 2012 | 2504 |
| 2013 | 2662 |
| 2014 | 2758 |
| 2015 | 2778 |
| 2016 | 2910 |
| 2017 | 2906 |
| 2018 | 2909 |