| 年度 | 实际值 |
|---|---|
| 1992 | 3 |
| 1993 | 2.9 |
| 1994 | |
| 1995 | 3.88 |
| 1996 | 2.92 |
| 1997 | 2.1 |
| 1998 | 7.14 |
| 1999 | -.11 |
| 2000 | -.01 |
| 2001 | -.98 |
| 2002 | -.66 |
| 2003 | -3.35 |
| 2004 | |
| 2005 | -1.36 |
| 2006 | |
| 2007 | -.36 |
| 2008 | -.79 |
| 2009 | |
| 2010 | -1.3 |
| 2011 | -1.6 |
| 2012 | -1.6 |
| 2013 | -1.2 |
| 2014 | 2.5 |
| 2015 | -1.04 |
| 2016 | 1.69 |
| 2017 | -3.41 |
| 2018 | -0.07 |