| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 58.12 | 179 |
| 2015 | 58.01 | 181 |
| 2014 | 57.99 | 181 |
| 2013 | 58.16 | 180 |
| 2012 | 58.15 | 181 |
| 2011 | 58.29 | 180 |
| 2010 | 60.47 | 174 |
| 2009 | 62.5 | 171 |
| 2008 | 64.41 | 163 |
| 2007 | 66.18 | 158 |
| 2006 | 67.78 | 146 |
| 2005 | 69.23 | 133 |
| 2004 | 70.6 | 124 |
| 2003 | 71.76 | 116 |
| 2002 | 72.71 | 113 |
| 2001 | 73.49 | 109 |
| 2000 | 74.18 | 99 |
| 1999 | 74.94 | 96 |
| 1998 | 75.53 | 94 |
| 1997 | 75.92 | 92 |
| 1996 | 76.13 | 92 |
| 1995 | 76.27 | 94 |
| 1994 | 76.87 | 93 |
| 1993 | 77.3 | 90 |
| 1992 | 77.5 | 89 |
| 1991 | 77.51 | 89 |
| 1990 | 76.71 | 100 |