| 年度 | 实际值 |
|---|---|
| 1992 | 232 |
| 1993 | 235.4 |
| 1994 | 237.94 |
| 1995 | 240 |
| 1996 | 242.51 |
| 1997 | 244.35 |
| 1998 | 246 |
| 1999 | 247.87 |
| 2000 | 256.4 |
| 2001 | 257.43 |
| 2002 | 258.28 |
| 2003 | 259.53 |
| 2004 | 262.83 |
| 2005 | 264.15 |
| 2006 | 267.73 |
| 2007 | 271.03 |
| 2008 | 273.29 |
| 2009 | |
| 2010 | 282.81 |
| 2011 | 284.6 |
| 2012 | 282.5 |
| 2013 | 285.1 |
| 2014 | |
| 2015 | 292.12 |
| 2016 | 296 |
| 2017 | 297 |
| 2018 | 300 |