| 年度 | 实际值 |
|---|---|
| 1993 | 717 |
| 1994 | 726 |
| 1995 | 767 |
| 1996 | 968 |
| 1997 | 2793 |
| 1998 | 3318 |
| 1999 | 3075 |
| 2000 | 3216 |
| 2001 | 3415 |
| 2002 | 2660 |
| 2003 | 2797 |
| 2004 | 2767 |
| 2005 | 3441 |
| 2006 | 2697 |
| 2007 | 2854 |
| 2008 | 5461 |
| 2009 | |
| 2010 | 3223 |
| 2011 | 3648 |
| 2012 | 3100 |
| 2013 | 3350 |
| 2014 | 4269 |
| 2015 | 4466 |
| 2016 | 4621 |
| 2017 | 5266 |
| 2018 | 5400 |