| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 45.22 | 117 |
| 2015 | 46.29 | 118 |
| 2014 | 47.31 | 119 |
| 2013 | 48.49 | 121 |
| 2012 | 49.79 | 121 |
| 2011 | 51.14 | 122 |
| 2010 | 52.48 | 123 |
| 2009 | 53.84 | 123 |
| 2008 | 55.24 | 124 |
| 2007 | 56.71 | 123 |
| 2006 | 58.34 | 123 |
| 2005 | 60.17 | 123 |
| 2004 | 61.9 | 124 |
| 2003 | 63.79 | 124 |
| 2002 | 65.81 | 124 |
| 2001 | 67.92 | 127 |
| 2000 | 70.1 | 127 |
| 1999 | 72.24 | 128 |
| 1998 | 74.42 | 130 |
| 1997 | 76.62 | 131 |
| 1996 | 78.8 | 138 |
| 1995 | 80.92 | 145 |
| 1994 | 82.89 | 143 |
| 1993 | 84.71 | 148 |
| 1992 | 86.4 | 154 |
| 1991 | 88.02 | 159 |
| 1990 | 89.6 | 161 |
| 1989 | 90.69 | 163 |
| 1988 | 91.71 | 166 |
| 1987 | 92.6 | 172 |
| 1986 | 93.27 | 174 |