| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.62 | 70 |
| 2015 | 2.15 | 84 |
| 2014 | 2.48 | 76 |
| 2013 | 4.92 | 52 |
| 2012 | 5.96 | 47 |
| 2011 | 3.66 | 58 |
| 2010 | 3.11 | 68 |
| 2009 | 5.16 | 70 |
| 2008 | 9.3 | 30 |
| 2007 | 4.65 | 70 |
| 2006 | 2.07 | 102 |
| 2005 | 0.04 | 124 |
| 2004 | 2.53 | 81 |
| 2003 | -4.8 | 132 |
| 2002 | -9.34 | 139 |
| 2001 | -2.86 | 128 |
| 2000 | -.29 | 110 |
| 1999 | 0.58 | 101 |
| 1998 | 3.97 | 45 |
| 1997 | 2.25 | 74 |
| 1996 | 5.02 | 38 |
| 1995 | 0.19 | 85 |
| 1994 | 4.5 | 26 |
| 1993 | 0.93 | 73 |
| 1992 | 1.53 | 61 |
| 1991 | 1.13 | 78 |
| 1990 | 1.97 | 60 |
| 1989 | 1.58 | 62 |
| 1988 | -2.27 | 81 |
| 1987 | 5.39 | 30 |
| 1986 | 8.95 | 15 |