| 年度 | 实际值 |
|---|---|
| 1992 | 432 |
| 1993 | 435 |
| 1994 | 430 |
| 1995 | 434 |
| 1996 | 438 |
| 1997 | 438 |
| 1998 | 438 |
| 1999 | 438 |
| 2000 | 440 |
| 2001 | 441 |
| 2002 | 442 |
| 2003 | 441.35 |
| 2004 | 442.09 |
| 2005 | 442.73 |
| 2006 | 443.26 |
| 2007 | 443.11 |
| 2008 | 444.31 |
| 2009 | |
| 2010 | 446.85 |
| 2011 | 448.52 |
| 2012 | 449.11 |
| 2013 | 450.7 |
| 2014 | 453.23 |
| 2015 | 453.61 |