| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2014 | 3.18 | 88 |
| 2013 | 9.77 | 21 |
| 2012 | -22.18 | 177 |
| 2011 | -19.41 | 180 |
| 2010 | 12.62 | 19 |
| 2009 | 27.61 | 5 |
| 2008 | 27.52 | 3 |
| 2007 | -10.14 | 168 |
| 2006 | 24.96 | 7 |
| 2005 | 5.28 | 64 |
| 2004 | -2.22 | 159 |
| 2003 | -4.56 | 157 |
| 2002 | -18.07 | 167 |
| 2001 | -21.11 | 167 |
| 2000 | 37.06 | 3 |
| 1999 | -.08 | 124 |
| 1998 | 4.16 | 74 |
| 1997 | -3.75 | 143 |
| 1996 | -10.57 | 151 |
| 1995 | -2.04 | 113 |
| 1994 | 26.12 | 3 |
| 1993 | -2.71 | 93 |
| 1992 | -8.8 | 112 |
| 1991 | -4.13 | 103 |
| 1990 | 12.5 | 13 |
| 1989 | -.14 | 90 |
| 1988 | 0.34 | 83 |
| 1987 | 31.15 | 4 |
| 1986 | 1.09 | 80 |