| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 73.75 | 48 |
| 2015 | 68.28 | 68 |
| 2014 | 62.27 | 88 |
| 2013 | 61.09 | 93 |
| 2012 | 63.31 | 92 |
| 2011 | 60.68 | 103 |
| 2010 | 57.89 | 100 |
| 2009 | 52.65 | 106 |
| 2008 | 55.35 | 128 |
| 2007 | 53.87 | 126 |
| 2006 | 53.19 | 126 |
| 2005 | 51.07 | 126 |
| 2004 | 50.66 | 119 |
| 2003 | 47.73 | 122 |
| 2002 | 45.01 | 126 |
| 2001 | 45.75 | 125 |
| 2000 | 50.59 | 110 |
| 1999 | 48.75 | 108 |
| 1998 | 49.11 | 101 |
| 1997 | 46.52 | 115 |
| 1996 | 47.3 | 112 |
| 1995 | 44.79 | 118 |
| 1994 | 27.09 | 160 |
| 1993 | 23.7 | 145 |
| 1992 | 30.36 | 128 |
| 1991 | 30.02 | 123 |
| 1990 | 32.07 | 121 |
| 1989 | 32.1 | 118 |
| 1988 | 32.81 | 115 |
| 1987 | 33.72 | 104 |
| 1986 | 30.42 | 113 |