| 年度 | 实际值 |
|---|---|
| 1992 | 280 |
| 1993 | 283 |
| 1994 | 284 |
| 1995 | 290 |
| 1996 | 293 |
| 1997 | 296 |
| 1998 | 299 |
| 1999 | 301 |
| 2000 | 306 |
| 2001 | 307 |
| 2002 | 308 |
| 2003 | 309.8 |
| 2004 | 313.77 |
| 2005 | 315.05 |
| 2006 | 316.33 |
| 2007 | 317.18 |
| 2008 | 318.39 |
| 2009 | |
| 2010 | 319.94 |
| 2011 | 326.15 |
| 2012 | 328.64 |
| 2013 | 330.89 |
| 2014 | 333.21 |
| 2015 | 343.89 |