| 年度 | 实际值 |
|---|---|
| 1992 | 302.08 |
| 1993 | 303.6 |
| 1994 | 307.15 |
| 1995 | 309.64 |
| 1996 | 311.63 |
| 1997 | 312.96 |
| 1998 | 314.29 |
| 1999 | 314.78 |
| 2000 | 315.01 |
| 2001 | 314.98 |
| 2002 | 314.83 |
| 2003 | 315.3 |
| 2004 | 315.78 |
| 2005 | 317.28 |
| 2006 | 319.95 |
| 2007 | 322.45 |
| 2008 | 325.58 |
| 2009 | |
| 2010 | 325.96 |
| 2011 | 327.1 |
| 2012 | 328.5 |
| 2013 | 329.7 |
| 2014 | |
| 2015 | 327.46 |
| 2016 | 327 |
| 2017 | 324 |
| 2018 | 323 |