| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 47.55 | 81 |
| 2015 | 49.19 | 89 |
| 2014 | 50.98 | 80 |
| 2013 | 49.05 | 82 |
| 2012 | 47.99 | 77 |
| 2011 | 47.73 | 78 |
| 2010 | 48.79 | 83 |
| 2009 | 54.22 | 69 |
| 2008 | 54.61 | 62 |
| 2007 | 54.21 | 69 |
| 2006 | 53.8 | 62 |
| 2005 | 53.13 | 60 |
| 2004 | 48.89 | 66 |
| 2003 | 47.13 | 70 |
| 2002 | 43.63 | 75 |
| 2001 | 41.51 | 75 |
| 2000 | 18.53 | 130 |
| 1999 | 16.98 | 131 |
| 1998 | 15.1 | 137 |
| 1997 | 15.06 | 135 |
| 1996 | 33.41 | 79 |
| 1995 | 26.42 | 95 |
| 1994 | 31.85 | 80 |
| 1993 | 31.55 | 84 |
| 1992 | 32.39 | 77 |
| 1991 | 34.1 | 72 |
| 1990 | 33.04 | 68 |
| 1989 | 31.55 | 68 |
| 1988 | 32.79 | 64 |
| 1987 | 29.39 | 75 |
| 1986 | 30.32 | 72 |