| 年度 | 实际值 |
|---|---|
| 1997 | 337000 |
| 1998 | 317400 |
| 1999 | 300000 |
| 2000 | 277800 |
| 2001 | 268300 |
| 2002 | 264300 |
| 2003 | 256100 |
| 2004 | 260100 |
| 2005 | 260200 |
| 2006 | 266100 |
| 2007 | 277600 |
| 2008 | 274500 |
| 2009 | |
| 2010 | 279800 |
| 2011 | 281700 |
| 2012 | 307400 |
| 2013 | 331700 |
| 2014 | 329900 |
| 2015 | 31.51 |
| 2016 | 300000 |
| 2017 | 280000 |
| 2018 | 270000 |