| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 84.259 | 3 |
| 2015 | 83.455 | 8 |
| 2014 | 83.13 | 8 |
| 2013 | 81.709 | 10 |
| 2012 | 81.106 | 12 |
| 2011 | 79.058 | 17 |
| 2010 | 78.241 | 20 |
| 2009 | 78.036 | 19 |
| 2008 | 76.564 | 18 |
| 2007 | 76.788 | 19 |
| 2006 | 75.391 | 20 |
| 2005 | 74.273 | 22 |
| 2004 | 72.735 | 25 |
| 2003 | 70.066 | 36 |
| 2002 | 70.004 | 34 |
| 2001 | 70.825 | 27 |
| 2000 | 67.874 | 38 |
| 1999 | 70.067 | 27 |
| 1998 | 68.901 | 29 |
| 1997 | 68.954 | 30 |
| 1996 | 68.737 | 29 |
| 1995 | 67.984 | 27 |
| 1994 | 45.914 | 95 |
| 1993 | 47.103 | 88 |
| 1992 | 45.371 | 86 |
| 1991 | 41.482 | 88 |
| 1990 | 40.679 | 87 |
| 1989 | 38.882 | 83 |
| 1988 | 39.002 | 83 |
| 1987 | 37.919 | 86 |
| 1986 | 35.775 | 90 |