| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 4.03 | 43 |
| 2015 | 2.75 | 68 |
| 2014 | 1.2 | 101 |
| 2013 | 1.22 | 102 |
| 2012 | 1.05 | 106 |
| 2011 | 0.94 | 102 |
| 2010 | 1.3 | 100 |
| 2009 | 3.02 | 95 |
| 2008 | 3.39 | 84 |
| 2007 | 1.47 | 113 |
| 2006 | 0.96 | 118 |
| 2005 | 0.49 | 121 |
| 2004 | -.79 | 121 |
| 2003 | 0.54 | 111 |
| 2002 | 1.2 | 105 |
| 2001 | 0.52 | 116 |
| 2000 | 1.36 | 91 |
| 1999 | 1.16 | 97 |
| 1998 | 2.06 | 79 |
| 1997 | 0.84 | 95 |
| 1996 | 2.39 | 71 |
| 1995 | 2.19 | 64 |
| 1994 | 3.13 | 47 |
| 1993 | 0.5 | 76 |
| 1992 | 5.41 | 32 |
| 1991 | 3.32 | 50 |
| 1990 | 2.01 | 57 |
| 1989 | -2.13 | 83 |
| 1988 | 1.47 | 56 |
| 1987 | 0.62 | 64 |
| 1986 | 1.43 | 66 |