| 年度 | 实际值 |
|---|---|
| 1994 | 17400 |
| 1995 | 17400 |
| 1996 | 20000 |
| 1997 | 17300 |
| 1998 | 17000 |
| 1999 | 20000 |
| 2000 | 19400 |
| 2001 | 19200 |
| 2002 | 28300 |
| 2003 | 52900 |
| 2004 | 53200 |
| 2005 | 52500 |
| 2006 | 53000 |
| 2007 | 53100 |
| 2008 | 52200 |
| 2009 | 51500 |
| 2010 | 52000 |
| 2011 | 50900 |
| 2012 | 50300 |
| 2013 | 50300 |
| 2014 | 51000 |
| 2015 | 51400 |
| 2016 | 5.05 |