| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 34.35 | 119 |
| 2015 | 34.91 | 119 |
| 2014 | 35.49 | 118 |
| 2013 | 36.1 | 118 |
| 2012 | 36.74 | 116 |
| 2011 | 37.4 | 115 |
| 2010 | 38.09 | 116 |
| 2009 | 38.82 | 115 |
| 2008 | 39.57 | 114 |
| 2007 | 40.35 | 113 |
| 2006 | 41.15 | 113 |
| 2005 | 41.99 | 113 |
| 2004 | 42.86 | 112 |
| 2003 | 43.75 | 110 |
| 2002 | 44.67 | 107 |
| 2001 | 45.62 | 105 |
| 2000 | 46.58 | 104 |
| 1999 | 47.53 | 100 |
| 1998 | 48.49 | 98 |
| 1997 | 49.45 | 94 |
| 1996 | 50.41 | 93 |
| 1995 | 51.37 | 92 |
| 1994 | 52.33 | 90 |
| 1993 | 53.28 | 89 |
| 1992 | 54.24 | 88 |
| 1991 | 55.21 | 87 |
| 1990 | 56.35 | 87 |
| 1989 | 57.49 | 87 |
| 1988 | 58.62 | 87 |
| 1987 | 59.74 | 86 |
| 1986 | 60.85 | 83 |