| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 40.21 | 105 |
| 2015 | 41.36 | 103 |
| 2014 | 42.56 | 102 |
| 2013 | 43.83 | 99 |
| 2012 | 45.16 | 97 |
| 2011 | 46.54 | 93 |
| 2010 | 47.98 | 90 |
| 2009 | 49.48 | 86 |
| 2008 | 51.02 | 83 |
| 2007 | 52.61 | 79 |
| 2006 | 54.24 | 76 |
| 2005 | 55.92 | 74 |
| 2004 | 57.62 | 72 |
| 2003 | 59.36 | 70 |
| 2002 | 61.07 | 68 |
| 2001 | 62.75 | 64 |
| 2000 | 64.4 | 60 |
| 1999 | 65.01 | 59 |
| 1998 | 65.61 | 59 |
| 1997 | 66.21 | 59 |
| 1996 | 66.8 | 56 |
| 1995 | 67.41 | 56 |
| 1994 | 68.01 | 56 |
| 1993 | 68.61 | 56 |
| 1992 | 69.2 | 53 |
| 1991 | 70.36 | 49 |
| 1990 | 71.49 | 45 |
| 1989 | 72.6 | 44 |
| 1988 | 73.67 | 43 |
| 1987 | 74.72 | 41 |
| 1986 | 75.75 | 40 |