| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 39.58 | 135 |
| 2015 | 47.76 | 117 |
| 2014 | 49.56 | 126 |
| 2013 | 52.51 | 121 |
| 2012 | 61.45 | 97 |
| 2011 | 66.63 | 90 |
| 2010 | 56.3 | 102 |
| 2009 | 51.87 | 110 |
| 2008 | 59.59 | 114 |
| 2007 | 63.28 | 98 |
| 2006 | 63.35 | 94 |
| 2005 | 60.65 | 96 |
| 2004 | 71.21 | 69 |
| 2003 | 50.83 | 110 |
| 2002 | 92.12 | 33 |
| 2001 | 50.78 | 106 |
| 2000 | 36.1 | 152 |
| 1999 | 36.42 | 141 |
| 1998 | 35.42 | 148 |
| 1997 | 36.97 | 140 |
| 1996 | 35.46 | 144 |
| 1995 | 42.05 | 128 |
| 1994 | 27.55 | 159 |
| 1993 | 22.62 | 147 |
| 1992 | 22.58 | 147 |
| 1991 | 23.6 | 140 |
| 1990 | 27.21 | 136 |
| 1989 | 27.55 | 129 |
| 1988 | 25.09 | 132 |
| 1987 | 28.79 | 120 |
| 1986 | 29.12 | 117 |