| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 2.26 | 104 |
| 2015 | 3.88 | 64 |
| 2014 | 4.31 | 66 |
| 2013 | 5.64 | 45 |
| 2012 | 5.25 | 52 |
| 2011 | 7.09 | 37 |
| 2010 | 7.09 | 45 |
| 2009 | 0.13 | 101 |
| 2008 | -3.31 | 193 |
| 2007 | 5.66 | 104 |
| 2006 | -3.63 | 198 |
| 2005 | 3.9 | 122 |
| 2004 | 0.69 | 188 |
| 2003 | 2.25 | 143 |
| 2002 | -.25 | 175 |
| 2001 | 2.14 | 123 |
| 2000 | -1.88 | 188 |
| 1999 | -8.93 | 193 |
| 1998 | 3.48 | 113 |
| 1997 | 5.74 | 57 |
| 1996 | 3.63 | 112 |
| 1995 | 4.97 | 70 |
| 1994 | 3.71 | 94 |
| 1993 | 3.95 | 72 |
| 1992 | -3.09 | 142 |
| 1991 | 6.11 | 35 |
| 1990 | 5.19 | 51 |
| 1989 | 8.55 | 20 |
| 1988 | 12.85 | 11 |
| 1987 | -17.15 | 161 |
| 1986 | -.8 | 137 |