| 年度 | 实际值 |
|---|---|
| 1992 | 43.3 |
| 1993 | |
| 1994 | |
| 1995 | 47.8 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 48.28 |
| 2000 | 487866 |
| 2001 | 489421 |
| 2002 | 39.6707 |
| 2003 | 42.2574 |
| 2004 | 42.4755 |
| 2005 | 42.3194 |
| 2006 | 40.41 |
| 2007 | 40.49 |
| 2008 | 40.61 |
| 2009 | 40.6413 |
| 2010 | 40.9566 |
| 2011 | 41.31 |
| 2012 | 41.63 |
| 2013 | 42.24 |
| 2014 | 43.18 |
| 2015 | 31.93 |
| 2016 | 32.14 |