| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 60.5 | 108 |
| 2015 | 61.83 | 128 |
| 2014 | 64.15 | 132 |
| 2013 | 64.15 | 136 |
| 2012 | 60.9 | 144 |
| 2011 | 60.11 | 146 |
| 2010 | 55.99 | 148 |
| 2009 | 55.42 | 145 |
| 2008 | 72.87 | 128 |
| 2007 | 63.68 | 139 |
| 2006 | 60.28 | 143 |
| 2005 | 53.15 | 155 |
| 2004 | 51.08 | 154 |
| 2003 | 51.4 | 150 |
| 2002 | 59.76 | 132 |
| 2001 | 54.8 | 141 |
| 2000 | 51.44 | 144 |
| 1999 | 46.86 | 142 |
| 1998 | 48.9 | 138 |
| 1997 | 46.85 | 144 |
| 1996 | 46.67 | 139 |
| 1995 | 43.61 | 149 |
| 1994 | 40.77 | 146 |
| 1993 | 39.12 | 139 |
| 1992 | 37.49 | 140 |
| 1991 | 38.05 | 137 |
| 1990 | 41.68 | 127 |
| 1989 | 46.59 | 100 |
| 1988 | 50.09 | 84 |
| 1987 | 49.01 | 86 |
| 1986 | 50.68 | 79 |