| 年度 | 实际值 |
|---|---|
| 1992 | 4.15 |
| 1993 | 4.27 |
| 1994 | 4.4 |
| 1995 | 4.56 |
| 1996 | |
| 1997 | |
| 1998 | |
| 1999 | 5.31 |
| 2000 | 53977 |
| 2001 | 54380 |
| 2002 | 9.1298 |
| 2003 | 8.8435 |
| 2004 | 8.9533 |
| 2005 | 8.867 |
| 2006 | 8.88 |
| 2007 | 8.74 |
| 2008 | 8.75 |
| 2009 | 7.6784 |
| 2010 | 8.5322 |
| 2011 | 8.534 |
| 2012 | 8.63 |
| 2013 | 9.16 |
| 2014 | 9.63 |
| 2015 | 11.26 |
| 2016 | 11.48 |