| 年度 | 实际值 |
|---|---|
| 1993 | 3097 |
| 1994 | 3204 |
| 1995 | 3114 |
| 1996 | 3100 |
| 1997 | 3151 |
| 1998 | 3300 |
| 1999 | 3261 |
| 2000 | 3270 |
| 2001 | 3550 |
| 2002 | 1897 |
| 2003 | 2173 |
| 2004 | 2190 |
| 2005 | 2098 |
| 2006 | 2364 |
| 2007 | 2955 |
| 2008 | 3008 |
| 2009 | |
| 2010 | 4235 |
| 2011 | 3387 |
| 2012 | 3607 |
| 2013 | 3752 |
| 2014 | 4049 |
| 2015 | 4249 |
| 2016 | 4386 |
| 2017 | 4730 |
| 2018 | 5583 |