| 年度 | 实际值 |
|---|---|
| 1992 | 144 |
| 1993 | |
| 1994 | |
| 1995 | 151.7 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 155 |
| 2000 | 155.1 |
| 2001 | 155.8 |
| 2002 | 156.1 |
| 2003 | 156.8 |
| 2004 | 157.3 |
| 2005 | 157.9 |
| 2006 | 158.7 |
| 2007 | 164.74 |
| 2008 | 165.8 |
| 2009 | 167.2 |
| 2010 | 168.1 |
| 2011 | 169 |
| 2012 | 169 |
| 2013 | 169.3 |
| 2014 | 169 |
| 2015 | 169.85 |
| 2016 | 171.46 |
| 2017 | 173.2 |
| 2018 | 175.2006 |