| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 35.77 | 146 |
| 2015 | 40.75 | 140 |
| 2014 | 46.58 | 134 |
| 2013 | 49.3 | 127 |
| 2012 | 51.31 | 125 |
| 2011 | 51.6 | 127 |
| 2010 | 47.77 | 131 |
| 2009 | 43.01 | 138 |
| 2008 | 35.58 | 175 |
| 2007 | 32.89 | 180 |
| 2006 | 30.82 | 184 |
| 2005 | 29.11 | 180 |
| 2004 | 28.31 | 181 |
| 2003 | 30.45 | 168 |
| 2002 | 29.18 | 166 |
| 2001 | 30.9 | 164 |
| 2000 | 27.96 | 167 |
| 1999 | 28.75 | 162 |
| 1998 | 27.86 | 164 |
| 1997 | 28.58 | 162 |
| 1996 | 27.39 | 166 |
| 1995 | 31.91 | 158 |
| 1994 | 34.45 | 138 |
| 1993 | 30.73 | 129 |
| 1992 | 34.19 | 120 |
| 1991 | 33.22 | 114 |
| 1990 | 28 | 135 |
| 1989 | 30.69 | 121 |
| 1988 | 35.67 | 105 |
| 1987 | 32.58 | 108 |
| 1986 | 35.08 | 101 |