| 年度 | 实际值 |
|---|---|
| 1992 | 528 |
| 1993 | 531 |
| 1994 | 532 |
| 1995 | 538 |
| 1996 | 540 |
| 1997 | 520 |
| 1998 | 521 |
| 1999 | 523 |
| 2000 | 521 |
| 2001 | 525 |
| 2002 | 525 |
| 2003 | 525.48 |
| 2004 | 526.55 |
| 2005 | 527 |
| 2006 | 527.5 |
| 2007 | 528.39 |
| 2008 | 529.38 |
| 2009 | |
| 2010 | 530.15 |
| 2011 | 532.96 |
| 2012 | 533.95 |
| 2013 | 533.47 |
| 2014 | 535.14 |
| 2015 | 535.09 |