| 年度 | 实际值 |
|---|---|
| 1992 | 3.3 |
| 1993 | 3.1 |
| 1994 | |
| 1995 | 2.04 |
| 1996 | 1.52 |
| 1997 | .82 |
| 1998 | 5.83 |
| 1999 | -.35 |
| 2000 | -.17 |
| 2001 | .1 |
| 2002 | .3 |
| 2003 | -1.4 |
| 2004 | |
| 2005 | -1.18 |
| 2006 | |
| 2007 | .03 |
| 2008 | -.93 |
| 2009 | |
| 2010 | -5.69 |
| 2011 | -1.6 |
| 2012 | -1.8 |
| 2013 | -2.8 |
| 2014 | -.9 |
| 2015 | -2.04 |
| 2016 | -0.32 |
| 2017 | -13.81 |
| 2018 | -1.14 |