| 年度 | 实际值 |
|---|---|
| 1993 | 698 |
| 1994 | 906 |
| 1995 | 797 |
| 1996 | 797 |
| 1997 | 609 |
| 1998 | 616 |
| 1999 | 654 |
| 2000 | 675 |
| 2001 | 643 |
| 2002 | 700 |
| 2003 | 1652 |
| 2004 | 1998 |
| 2005 | 2427 |
| 2006 | 2300 |
| 2007 | 2401 |
| 2008 | 2428 |
| 2009 | 2521 |
| 2010 | 2628 |
| 2011 | 2836 |
| 2012 | 2925 |
| 2013 | 3050 |
| 2014 | 3181 |
| 2015 | 3364 |
| 2016 | 3094 |
| 2017 | 3182 |
| 2018 | 3408 |