| 年度 | 实际值 |
|---|---|
| 1993 | 3218 |
| 1994 | 3333 |
| 1995 | 1635 |
| 1996 | 2839 |
| 1997 | 3097 |
| 1998 | 3156 |
| 1999 | 2848 |
| 2000 | 2915 |
| 2001 | 2596 |
| 2002 | 2815 |
| 2003 | 2243 |
| 2004 | 2190 |
| 2005 | 2306 |
| 2006 | 2591 |
| 2007 | 2521 |
| 2008 | 2515 |
| 2009 | |
| 2010 | 4472 |
| 2011 | 2508 |
| 2012 | 3778 |
| 2013 | 4132 |
| 2014 | 4375 |
| 2015 | 4703 |
| 2016 | 4995 |
| 2017 | 5137 |
| 2018 | 5230 |