| 年度 | 实际值 |
|---|---|
| 1992 | 2.8 |
| 1993 | 2.9 |
| 1994 | |
| 1995 | 1.83 |
| 1996 | 1.38 |
| 1997 | .94 |
| 1998 | 6.31 |
| 1999 | -.09 |
| 2000 | 1.6 |
| 2001 | .84 |
| 2002 | .85 |
| 2003 | -.81 |
| 2004 | .03 |
| 2005 | .89 |
| 2006 | 1.11 |
| 2007 | 2.35 |
| 2008 | -.83 |
| 2009 | |
| 2010 | -.59 |
| 2011 | -.1 |
| 2012 | |
| 2013 | .1 |
| 2014 | 1.9 |
| 2015 | -1.58 |
| 2016 | 1.17 |
| 2017 | -2.52 |
| 2018 | -0.6 |