| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | -1.16 | 178 |
| 2015 | -1.09 | 177 |
| 2014 | -1.04 | 173 |
| 2013 | -1.04 | 176 |
| 2012 | -1.12 | 175 |
| 2011 | -1.25 | 174 |
| 2010 | -1.35 | 179 |
| 2009 | -1.43 | 183 |
| 2008 | -1.51 | 186 |
| 2007 | -1.56 | 187 |
| 2006 | -1.57 | 189 |
| 2005 | -1.58 | 189 |
| 2004 | -1.62 | 191 |
| 2003 | -1.63 | 191 |
| 2002 | -1.64 | 191 |
| 2001 | -1.65 | 191 |
| 2000 | -.29 | 153 |
| 1999 | 0.98 | 82 |
| 1998 | 0.95 | 83 |
| 1997 | 0.93 | 89 |
| 1996 | 0.91 | 93 |
| 1995 | 0.87 | 96 |
| 1994 | 0.87 | 94 |
| 1993 | 0.98 | 96 |
| 1992 | 1.25 | 83 |
| 1991 | 1.64 | 67 |
| 1990 | 2.1 | 48 |
| 1989 | 1.78 | 65 |
| 1988 | 1.39 | 85 |
| 1987 | 1.51 | 80 |
| 1986 | 1.48 | 79 |