| 年度 | 实际值 |
|---|---|
| 1992 | 423 |
| 1993 | 431 |
| 1994 | 434 |
| 1995 | 441 |
| 1996 | 447 |
| 1997 | 458 |
| 1998 | 461 |
| 1999 | 467 |
| 2000 | 470 |
| 2001 | 470 |
| 2002 | 473 |
| 2003 | 486.71 |
| 2004 | 496.16 |
| 2005 | 493.99 |
| 2006 | 501.3 |
| 2007 | 514.6 |
| 2008 | 520.16 |
| 2009 | |
| 2010 | 524.53 |
| 2011 | 538.5 |
| 2012 | 539.49 |
| 2013 | 550.39 |
| 2014 | 556.37 |
| 2015 | 558.06 |