| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 22.33 | 155 |
| 2015 | 23.18 | 152 |
| 2014 | 24.09 | 149 |
| 2013 | 25.04 | 149 |
| 2012 | 26.06 | 147 |
| 2011 | 27.13 | 145 |
| 2010 | 28.27 | 144 |
| 2009 | 29.43 | 143 |
| 2008 | 30.61 | 141 |
| 2007 | 31.83 | 138 |
| 2006 | 33.07 | 134 |
| 2005 | 34.33 | 129 |
| 2004 | 35.62 | 128 |
| 2003 | 36.92 | 125 |
| 2002 | 38.25 | 123 |
| 2001 | 39.59 | 121 |
| 2000 | 40.95 | 119 |
| 1999 | 41.85 | 116 |
| 1998 | 42.74 | 116 |
| 1997 | 43.64 | 114 |
| 1996 | 44.54 | 113 |
| 1995 | 45.44 | 112 |
| 1994 | 46.35 | 109 |
| 1993 | 47.26 | 107 |
| 1992 | 48.17 | 107 |
| 1991 | 49.08 | 106 |
| 1990 | 50 | 103 |
| 1989 | 50.91 | 101 |
| 1988 | 51.82 | 98 |
| 1987 | 52.74 | 97 |
| 1986 | 53.65 | 98 |