| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 53.43 | 89 |
| 2015 | 56.4 | 89 |
| 2014 | 61.21 | 92 |
| 2013 | 64.24 | 86 |
| 2012 | 69.09 | 82 |
| 2011 | 70.54 | 75 |
| 2010 | 69.59 | 71 |
| 2009 | 71.97 | 61 |
| 2008 | 71.63 | 80 |
| 2007 | 70.67 | 78 |
| 2006 | 77.15 | 68 |
| 2005 | 94.54 | 39 |
| 2004 | 106.78 | 23 |
| 1990 | 11.14 | 154 |
| 1989 | 40.89 | 95 |
| 1988 | 34.48 | 106 |
| 1987 | 33.61 | 105 |
| 1986 | 40.73 | 87 |