| 年度 | 实际值 |
|---|---|
| 1992 | 301.35 |
| 1993 | 304.45 |
| 1994 | 306.17 |
| 1995 | 309.95 |
| 1996 | 313.67 |
| 1997 | 318.69 |
| 1998 | 320.8 |
| 1999 | 322.29 |
| 2000 | 322.88 |
| 2001 | 323.5 |
| 2002 | 326.08 |
| 2003 | 326.67 |
| 2004 | 327.67 |
| 2005 | 331.89 |
| 2006 | 331.28 |
| 2007 | 334.94 |
| 2008 | 337.55 |
| 2009 | 339.12 |
| 2010 | 340.55 |
| 2011 | 341.14 |
| 2012 | 60.26 |
| 2013 | 328.4 |
| 2014 | 328.11 |
| 2015 | 326.41 |
| 2016 | 324 |
| 2017 | 320 |
| 2018 | 319 |