| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.12 | 110 |
| 2015 | 60.35 | 131 |
| 2014 | 62.36 | 136 |
| 2013 | 63.6 | 137 |
| 2012 | 65.41 | 134 |
| 2011 | 67.47 | 136 |
| 2010 | 69.87 | 122 |
| 2009 | 71.32 | 109 |
| 2008 | 76.68 | 121 |
| 2007 | 71.94 | 128 |
| 2006 | 70.73 | 127 |
| 2005 | 71.28 | 118 |
| 2004 | 65.7 | 134 |
| 2003 | 62.12 | 131 |
| 2002 | 61.13 | 126 |
| 2001 | 58.71 | 127 |
| 2000 | 62.86 | 115 |
| 1999 | 50.93 | 130 |
| 1998 | 45.09 | 146 |
| 1997 | 52.24 | 129 |
| 1996 | 53.71 | 122 |
| 1995 | 55.19 | 123 |
| 1994 | 48.58 | 131 |
| 1993 | 44.92 | 127 |
| 1992 | 49.19 | 117 |
| 1991 | 52.72 | 100 |
| 1990 | 48.38 | 108 |
| 1989 | 47.15 | 97 |
| 1988 | 38.11 | 113 |
| 1987 | 32.68 | 121 |
| 1986 | 36.03 | 108 |