| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 57.34 | 112 |
| 2015 | 58.43 | 134 |
| 2014 | 62.6 | 135 |
| 2013 | 64.52 | 134 |
| 2012 | 72.06 | 125 |
| 2011 | 71.69 | 127 |
| 2010 | 67.99 | 129 |
| 2009 | 63.79 | 129 |
| 2008 | 77.29 | 119 |
| 2007 | 81.49 | 109 |
| 2006 | 81.11 | 107 |
| 2005 | 81.48 | 98 |
| 2004 | 78.16 | 105 |
| 2003 | 70.09 | 109 |
| 2002 | 68.62 | 110 |
| 2001 | 64.93 | 113 |
| 2000 | 71.19 | 102 |
| 1999 | 67.76 | 99 |
| 1998 | 59.8 | 111 |
| 1997 | 60.53 | 113 |
| 1996 | 61.36 | 105 |
| 1995 | 62.96 | 109 |
| 1994 | 80.58 | 63 |
| 1993 | 81.01 | 55 |
| 1992 | 74.97 | 67 |
| 1991 | 75.25 | 57 |
| 1990 | 80.08 | 52 |
| 1989 | 82.53 | 50 |
| 1988 | 83.26 | 45 |
| 1987 | 96.3 | 33 |
| 1986 | 91.81 | 43 |