| 年度 | 实际值 |
|---|---|
| 1992 | 436 |
| 1993 | 441 |
| 1994 | 444 |
| 1995 | 454 |
| 1996 | 459 |
| 1997 | 463 |
| 1998 | 455 |
| 1999 | 458 |
| 2000 | 465 |
| 2001 | 468 |
| 2002 | 472 |
| 2003 | 474.61 |
| 2004 | 480.34 |
| 2005 | 484.76 |
| 2006 | 490.08 |
| 2007 | 497.1 |
| 2008 | 500.64 |
| 2009 | |
| 2010 | 510.09 |
| 2011 | 515.97 |
| 2012 | 518.13 |
| 2013 | 523.31 |
| 2014 | 516.91 |
| 2015 | 518.21 |