| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 35.54 | 147 |
| 2015 | 37.28 | 152 |
| 2014 | 45.28 | 140 |
| 2013 | 47.83 | 135 |
| 2012 | 45.66 | 144 |
| 2011 | 42.61 | 161 |
| 2010 | 47.65 | 133 |
| 2009 | 48.01 | 122 |
| 2008 | 59.44 | 116 |
| 2007 | 60.47 | 109 |
| 2006 | 60.76 | 104 |
| 2005 | 58.03 | 107 |
| 2004 | 55.92 | 112 |
| 2003 | 54.98 | 96 |
| 2002 | 54.21 | 99 |
| 2001 | 53.64 | 98 |
| 2000 | 55.61 | 95 |
| 1999 | 58.99 | 80 |
| 1998 | 57.84 | 83 |
| 1997 | 59.95 | 76 |
| 1996 | 63.59 | 70 |
| 1995 | 69.12 | 55 |
| 1994 | 65.49 | 56 |
| 1993 | 71.94 | 36 |
| 1992 | 75.51 | 39 |
| 1991 | 71.62 | 36 |
| 1990 | 60.07 | 55 |
| 1989 | 47.4 | 82 |
| 1988 | 66.98 | 35 |
| 1987 | 78.89 | 24 |
| 1986 | 78.16 | 26 |