| 年度 | 实际值 |
|---|---|
| 1993 | 13731 |
| 1994 | 13733 |
| 1995 | 13629 |
| 1996 | 13118 |
| 1997 | 13266 |
| 1998 | 12980 |
| 1999 | 13105 |
| 2000 | 8542 |
| 2001 | 9157 |
| 2002 | 9426 |
| 2003 | 9802 |
| 2004 | 13086 |
| 2005 | 13415 |
| 2006 | 14243 |
| 2007 | 14795 |
| 2008 | 15126 |
| 2009 | |
| 2010 | 15596 |
| 2011 | 16149 |
| 2012 | 17891 |
| 2013 | 20662 |
| 2014 | 21602 |
| 2015 | 22307 |
| 2016 | 25272 |
| 2017 | 28100 |
| 2018 | 31560 |