| 年度 | 实际值 |
|---|---|
| 1993 | 2160 |
| 1994 | 2279 |
| 1995 | 2389 |
| 1996 | 2861 |
| 1997 | 2992 |
| 1998 | 3067 |
| 1999 | 3361 |
| 2000 | |
| 2001 | |
| 2002 | |
| 2003 | 11842 |
| 2004 | 13445 |
| 2005 | 14001 |
| 2006 | 15023 |
| 2007 | 15176 |
| 2008 | 15747 |
| 2009 | |
| 2010 | 16557 |
| 2011 | 17583 |
| 2012 | 17958 |
| 2013 | 18333 |
| 2014 | 18543 |
| 2015 | 18724 |
| 2016 | 18905 |
| 2017 | 19110 |
| 2018 | 19316 |