| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 33.87 | 149 |
| 2015 | 39.78 | 142 |
| 2014 | 52.25 | 119 |
| 2013 | 54.66 | 112 |
| 2012 | 56 | 111 |
| 2011 | 58.98 | 107 |
| 2010 | 54.75 | 110 |
| 2009 | 46.31 | 131 |
| 2008 | 60.99 | 109 |
| 2007 | 55.31 | 122 |
| 2006 | 53.08 | 127 |
| 2005 | 49.12 | 132 |
| 2004 | 43.67 | 144 |
| 2003 | 39.85 | 144 |
| 2002 | 40.19 | 144 |
| 2001 | 41.04 | 139 |
| 2000 | 47.19 | 119 |
| 1999 | 38.01 | 135 |
| 1998 | 34.95 | 150 |
| 1997 | 36.28 | 145 |
| 1996 | 37.59 | 139 |
| 1995 | 34.62 | 149 |
| 1994 | 32.77 | 145 |
| 1993 | 28.86 | 133 |
| 1992 | 30.05 | 129 |
| 1991 | 30.91 | 122 |
| 1990 | 30.02 | 129 |
| 1989 | 30.3 | 124 |
| 1988 | 29.93 | 120 |
| 1987 | 29.97 | 117 |
| 1986 | 26 | 123 |