| 年度 | 实际值 |
|---|---|
| 1992 | 240 |
| 1993 | 242 |
| 1994 | 243 |
| 1995 | 248 |
| 1996 | 265 |
| 1997 | 271 |
| 1998 | 243 |
| 1999 | 252 |
| 2000 | 261 |
| 2001 | 326 |
| 2002 | 331 |
| 2003 | 332.34 |
| 2004 | 330.91 |
| 2005 | 297.51 |
| 2006 | 300.74 |
| 2007 | 305.34 |
| 2008 | 309.17 |
| 2009 | |
| 2010 | 312.85 |
| 2011 | 280.13 |
| 2012 | 295.78 |
| 2013 | 282.23 |
| 2014 | 282.56 |
| 2015 | 250.94 |