| 年度 | 实际值 |
|---|---|
| 1992 | 367 |
| 1993 | 369 |
| 1994 | 370 |
| 1995 | 371 |
| 1996 | 374 |
| 1997 | 376 |
| 1998 | 378 |
| 1999 | 379 |
| 2000 | 383 |
| 2001 | 384 |
| 2002 | 384 |
| 2003 | 384.46 |
| 2004 | 384.59 |
| 2005 | 383.74 |
| 2006 | 384.88 |
| 2007 | 386.63 |
| 2008 | 386.65 |
| 2009 | |
| 2010 | 387.08 |
| 2011 | 382.13 |
| 2012 | 380.74 |
| 2013 | 380.13 |
| 2014 | 379.75 |
| 2015 | 373.85 |