| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 56.63 | 113 |
| 2015 | 67.93 | 114 |
| 2014 | 85.26 | 90 |
| 2013 | 81.23 | 103 |
| 2012 | 84.95 | 99 |
| 2011 | 82.48 | 105 |
| 2010 | 75.51 | 108 |
| 2009 | 68.63 | 119 |
| 2008 | 82.87 | 108 |
| 2007 | 76.06 | 121 |
| 2006 | 74.54 | 117 |
| 2005 | 67.64 | 131 |
| 2004 | 57.46 | 145 |
| 2003 | 51.97 | 148 |
| 2002 | 49.35 | 150 |
| 2001 | 45.23 | 153 |
| 2000 | 45.6 | 153 |
| 1999 | 44.17 | 147 |
| 1998 | 52.28 | 126 |
| 1997 | 50.47 | 136 |
| 1996 | 49.86 | 131 |
| 1995 | 49.74 | 135 |
| 1994 | 48.86 | 129 |
| 1993 | 47.47 | 123 |
| 1992 | 49.11 | 118 |
| 1991 | 48.44 | 113 |
| 1990 | 46.7 | 112 |
| 1989 | 45.65 | 101 |
| 1988 | 41.91 | 104 |
| 1987 | 43.62 | 100 |
| 1986 | 47.03 | 90 |