| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 65.65 | 95 |
| 2015 | 65.09 | 95 |
| 2014 | 64.51 | 93 |
| 2013 | 63.9 | 93 |
| 2012 | 63.27 | 95 |
| 2011 | 62.6 | 97 |
| 2010 | 61.91 | 96 |
| 2009 | 61.19 | 97 |
| 2008 | 60.43 | 98 |
| 2007 | 59.66 | 99 |
| 2006 | 58.85 | 99 |
| 2005 | 58.01 | 99 |
| 2004 | 57.14 | 100 |
| 2003 | 56.25 | 102 |
| 2002 | 55.33 | 105 |
| 2001 | 54.38 | 107 |
| 2000 | 53.42 | 108 |
| 1999 | 52.47 | 112 |
| 1998 | 51.51 | 114 |
| 1997 | 50.55 | 118 |
| 1996 | 49.59 | 119 |
| 1995 | 48.63 | 120 |
| 1994 | 47.67 | 122 |
| 1993 | 46.72 | 123 |
| 1992 | 45.76 | 124 |
| 1991 | 44.79 | 125 |
| 1990 | 43.65 | 125 |
| 1989 | 42.51 | 123 |
| 1988 | 41.38 | 123 |
| 1987 | 40.26 | 124 |
| 1986 | 39.15 | 127 |