| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.14 | 106 |
| 2015 | 4.21 | 27 |
| 2014 | 0.92 | 130 |
| 2013 | 0.83 | 130 |
| 2012 | 4.6 | 38 |
| 2011 | 5.41 | 37 |
| 2010 | 5.42 | 38 |
| 2009 | 1.18 | 54 |
| 2008 | 5.72 | 34 |
| 2007 | 3.93 | 103 |
| 2006 | 3.38 | 111 |
| 2005 | 2.63 | 116 |
| 2004 | 0.87 | 166 |
| 2003 | 3.7 | 71 |
| 2002 | -.14 | 145 |
| 2001 | 2.61 | 71 |
| 2000 | 2.87 | 102 |
| 1999 | -.57 | 145 |
| 1998 | 0.38 | 139 |
| 1997 | 2.38 | 102 |
| 1996 | 4.07 | 64 |
| 1995 | 1.58 | 112 |
| 1994 | 4.03 | 49 |
| 1993 | 1.49 | 81 |
| 1992 | 4.86 | 35 |
| 1991 | 4.97 | 24 |
| 1990 | 4.2 | 36 |
| 1989 | 4.07 | 42 |
| 1988 | 6.86 | 28 |
| 1987 | -.96 | 120 |
| 1986 | 2.75 | 57 |