| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 48.67 | 105 |
| 2015 | 55.61 | 92 |
| 2014 | 52.25 | 118 |
| 2013 | 44.76 | 143 |
| 2012 | 52.26 | 123 |
| 2011 | 55.61 | 118 |
| 2010 | 53.41 | 115 |
| 2009 | 43.1 | 137 |
| 2008 | 45.83 | 151 |
| 2007 | 47.11 | 142 |
| 2006 | 56.23 | 118 |
| 2005 | 52.46 | 119 |
| 2004 | 45.47 | 135 |
| 2003 | 39.42 | 148 |
| 2002 | 42.52 | 134 |
| 2001 | 46.92 | 122 |
| 2000 | 49.97 | 112 |
| 1999 | 57.48 | 84 |
| 1998 | 72.1 | 53 |
| 1997 | 60.96 | 73 |
| 1996 | 54.06 | 85 |
| 1995 | 51.03 | 98 |
| 1994 | 56.04 | 74 |
| 1993 | 50.69 | 76 |
| 1992 | 35.73 | 115 |
| 1991 | 25.97 | 135 |
| 1990 | 30.5 | 128 |
| 1989 | 34.73 | 109 |
| 1988 | 42.74 | 87 |
| 1987 | 25.57 | 129 |
| 1986 | 13.56 | 140 |