| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 70.35 | 121 |
| 2015 | 70.16 | 124 |
| 2014 | 69.96 | 124 |
| 2013 | 69.85 | 125 |
| 2012 | 69.72 | 124 |
| 2011 | 69.57 | 124 |
| 2010 | 69.62 | 129 |
| 2009 | 69.69 | 128 |
| 2008 | 69.77 | 130 |
| 2007 | 69.84 | 128 |
| 2006 | 69.92 | 126 |
| 2005 | 71.15 | 121 |
| 2004 | 72.38 | 112 |
| 2003 | 73.57 | 101 |
| 2002 | 74.74 | 91 |
| 2001 | 75.87 | 87 |
| 2000 | 76.96 | 80 |
| 1999 | 78.06 | 77 |
| 1998 | 79.12 | 72 |
| 1997 | 80.14 | 65 |
| 1996 | 81.12 | 54 |
| 1995 | 82.07 | 50 |
| 1994 | 82.97 | 42 |
| 1993 | 83.86 | 38 |
| 1992 | 84.73 | 29 |
| 1991 | 85.56 | 25 |
| 1990 | 86.37 | 23 |