| 年度 | 实际值 |
|---|---|
| 1992 | 399 |
| 1993 | 403 |
| 1994 | 403 |
| 1995 | 407 |
| 1996 | 409 |
| 1997 | 411 |
| 1998 | 413 |
| 1999 | 415 |
| 2000 | 419 |
| 2001 | 421 |
| 2002 | 423 |
| 2003 | 424.29 |
| 2004 | 425.64 |
| 2005 | 426.75 |
| 2006 | 427.77 |
| 2007 | 430.38 |
| 2008 | 432.8 |
| 2009 | |
| 2010 | 449.31 |
| 2011 | 449.16 |
| 2012 | 448.45 |
| 2013 | 443.55 |
| 2014 | 445.04 |
| 2015 | 444.49 |