| 年度 | 实际值 |
|---|---|
| 1992 | 551 |
| 1993 | 557 |
| 1994 | 560 |
| 1995 | 576 |
| 1996 | 594 |
| 1997 | 598 |
| 1998 | 602 |
| 1999 | 606 |
| 2000 | 602 |
| 2001 | 605 |
| 2002 | 607 |
| 2003 | 609.81 |
| 2004 | 612.26 |
| 2005 | 614.45 |
| 2006 | 608.62 |
| 2007 | 612.16 |
| 2008 | 615.28 |
| 2009 | |
| 2010 | 622.12 |
| 2011 | 625.97 |
| 2012 | 629.29 |
| 2013 | 638.68 |
| 2014 | 650.22 |
| 2015 | 655.47 |