| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 55.31 | 67 |
| 2015 | 57.76 | 70 |
| 2014 | 57.07 | 69 |
| 2013 | 55.12 | 67 |
| 2012 | 51.69 | 70 |
| 2011 | 53.29 | 66 |
| 2010 | 53.41 | 71 |
| 2009 | 50.36 | 82 |
| 2008 | 44.84 | 84 |
| 2007 | 44.47 | 86 |
| 2006 | 42.43 | 85 |
| 2005 | 47 | 74 |
| 2004 | 39.58 | 86 |
| 2003 | 34.72 | 95 |
| 2002 | 34.46 | 94 |
| 2001 | 30.55 | 102 |
| 2000 | 41.09 | 67 |
| 1999 | 41.79 | 67 |
| 1998 | 44.04 | 62 |
| 1997 | 38.05 | 68 |
| 1996 | 34.82 | 76 |
| 1995 | 31.16 | 81 |
| 1994 | 30.74 | 85 |
| 1993 | 28.95 | 88 |
| 1992 | 24.99 | 97 |
| 1991 | 26.68 | 89 |
| 1990 | 26.09 | 84 |
| 1989 | 26.37 | 83 |
| 1988 | 25.46 | 83 |
| 1987 | 25.32 | 87 |
| 1986 | 29.05 | 75 |