| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.366 | 47 |
| 2015 | 66.213 | 58 |
| 2014 | 66.75 | 60 |
| 2013 | 66.573 | 63 |
| 2012 | 66.908 | 62 |
| 2011 | 67.353 | 60 |
| 2010 | 69.376 | 50 |
| 2009 | 68.731 | 54 |
| 2008 | 68.741 | 50 |
| 2007 | 64.996 | 66 |
| 2006 | 62.325 | 75 |
| 2005 | 56.465 | 97 |
| 2004 | 55.661 | 101 |
| 2003 | 53.797 | 105 |
| 2002 | 55.035 | 102 |
| 2001 | 55.602 | 99 |
| 2000 | 55.711 | 93 |
| 1999 | 51.235 | 106 |
| 1998 | 49.543 | 110 |
| 1997 | 47.144 | 112 |
| 1996 | 42.136 | 123 |
| 1995 | 32.067 | 146 |
| 1994 | 23.845 | 139 |
| 1993 | 19.431 | 136 |
| 1992 | 23.171 | 130 |
| 1991 | 34.27 | 114 |
| 1990 | 35.211 | 102 |
| 1989 | 38.346 | 85 |
| 1988 | 38.235 | 85 |
| 1987 | 37.879 | 87 |
| 1986 | 35.938 | 88 |