| 年度 | 实际值 |
|---|---|
| 1992 | 214 |
| 1993 | 216 |
| 1994 | 217 |
| 1995 | 220 |
| 1996 | 223 |
| 1997 | 226 |
| 1998 | 228 |
| 1999 | 229 |
| 2000 | 229 |
| 2001 | 230 |
| 2002 | 232 |
| 2003 | 232.01 |
| 2004 | 232.72 |
| 2005 | 235.72 |
| 2006 | 235.29 |
| 2007 | 237.89 |
| 2008 | 239.74 |
| 2009 | |
| 2010 | 241.87 |
| 2011 | 242.29 |
| 2012 | 238.86 |
| 2013 | 233.24 |
| 2014 | 233.03 |
| 2015 | 226.67 |