| 年度 | 实际值 |
|---|---|
| 1992 | 297 |
| 1993 | 301 |
| 1994 | 303 |
| 1995 | 307 |
| 1996 | 310 |
| 1997 | 313 |
| 1998 | 315 |
| 1999 | 317 |
| 2000 | 328 |
| 2001 | 329 |
| 2002 | 331 |
| 2003 | 332.18 |
| 2004 | 336.4 |
| 2005 | 338.09 |
| 2006 | 342.65 |
| 2007 | 346.9 |
| 2008 | 343.93 |
| 2009 | |
| 2010 | 355.9 |
| 2011 | 357.76 |
| 2012 | 355.08 |
| 2013 | 358.38 |
| 2014 | 363.79 |
| 2015 | 367.02 |