| 年度 | 实际值 |
|---|---|
| 1993 | 72000 |
| 1994 | 71500 |
| 1995 | 69900 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | |
| 2000 | 49276 |
| 2001 | 44903 |
| 2002 | 45023 |
| 2003 | 46419 |
| 2004 | 42848 |
| 2005 | 39552 |
| 2006 | 37436 |
| 2007 | 35903 |
| 2008 | 34528 |
| 2009 | 33079 |
| 2010 | 32350 |
| 2011 | 32109 |
| 2012 | 29752 |
| 2013 | 26444 |
| 2014 | 25261 |
| 2015 | 25267 |
| 2016 | 20687 |
| 2017 | 19921 |