| 年度 | 实际值 |
|---|---|
| 1992 | 233 |
| 1993 | 236 |
| 1994 | 237 |
| 1995 | 241 |
| 1996 | 244 |
| 1997 | 247 |
| 1998 | 250 |
| 1999 | 224 |
| 2000 | 228 |
| 2001 | 231 |
| 2002 | 234 |
| 2003 | 237.22 |
| 2004 | 238.23 |
| 2005 | 240.86 |
| 2006 | 244.78 |
| 2007 | 246.39 |
| 2008 | 253.71 |
| 2009 | |
| 2010 | 277.89 |
| 2011 | 258.92 |
| 2012 | 258.65 |
| 2013 | 260.23 |
| 2014 | 261.99 |
| 2015 | 301.86 |