| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 3.205 | 85 |
| 2014 | 2.33 | 115 |
| 2013 | 2.33 | 118 |
| 2012 | 2.799 | 117 |
| 2011 | 2.904 | 115 |
| 2010 | 3.95 | 99 |
| 2009 | 2.588 | 68 |
| 2008 | 4.279 | 88 |
| 2007 | 8.074 | 64 |
| 2006 | 12.572 | 15 |
| 2005 | 14.187 | 5 |
| 2004 | 6.883 | 60 |
| 2003 | 5.179 | 64 |
| 2002 | 2.183 | 114 |
| 2001 | 5.511 | 45 |
| 2000 | 4.938 | 75 |
| 1999 | 5.477 | 42 |
| 1998 | 4.566 | 59 |
| 1997 | 1.852 | 123 |
| 1996 | 5.496 | 49 |
| 1995 | -.941 | 112 |
| 1994 | -1.949 | 111 |
| 1993 | -11.603 | 122 |
| 1992 | -7.603 | 118 |
| 1991 | -6.243 | 116 |
| 1990 | -2.064 | 97 |
| 1989 | 0.758 | 85 |
| 1988 | 3.137 | 61 |
| 1987 | -.934 | 94 |
| 1986 | 3.449 | 56 |