| 年度 | 实际值 |
|---|---|
| 1993 | 41000 |
| 1994 | 43300 |
| 1995 | 45500 |
| 1996 | 50000 |
| 1997 | 48300 |
| 1998 | 45900 |
| 1999 | |
| 2000 | 37592 |
| 2001 | 32646 |
| 2002 | 27797 |
| 2003 | 24937 |
| 2004 | 24118 |
| 2005 | 24505 |
| 2006 | 25186 |
| 2007 | 26915 |
| 2008 | 27804 |
| 2009 | 28287 |
| 2010 | 28421 |
| 2011 | 29560 |
| 2012 | 29639 |
| 2013 | 30725 |
| 2014 | 31571 |
| 2015 | 33046 |
| 2016 | 34494 |
| 2017 | 34942 |