| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 63.903 | 54 |
| 2015 | 59.027 | 95 |
| 2014 | 50.95 | 127 |
| 2013 | 47.68 | 142 |
| 2012 | 44.042 | 147 |
| 2011 | 40.704 | 154 |
| 2010 | 43.149 | 149 |
| 2009 | 43.888 | 147 |
| 2008 | 33.402 | 161 |
| 2007 | 37.543 | 157 |
| 2006 | 38.164 | 157 |
| 2005 | 39.181 | 154 |
| 2004 | 41.732 | 144 |
| 2003 | 45.754 | 127 |
| 2002 | 53.718 | 106 |
| 2001 | 51.589 | 109 |
| 2000 | 49.098 | 114 |
| 1999 | 55.415 | 87 |
| 1998 | 57.001 | 80 |
| 1997 | 52.958 | 91 |
| 1996 | 50.759 | 97 |
| 1995 | 50.637 | 97 |
| 1994 | 48.982 | 85 |
| 1993 | 52.504 | 64 |
| 1992 | 51.664 | 64 |
| 1991 | 49.392 | 64 |
| 1990 | 50.204 | 61 |
| 1989 | 53.727 | 39 |
| 1988 | 56.743 | 30 |
| 1987 | 55.762 | 30 |
| 1986 | 57.95 | 28 |