| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 69.62 | 86 |
| 2015 | 78.1 | 90 |
| 2014 | 80.62 | 98 |
| 2013 | 83.06 | 99 |
| 2012 | 91.69 | 87 |
| 2011 | 78.38 | 115 |
| 2010 | 64.88 | 136 |
| 2009 | 57.33 | 139 |
| 2008 | 75.01 | 125 |
| 2007 | 65.18 | 136 |
| 2006 | 83.21 | 102 |
| 2005 | 69.9 | 125 |
| 2004 | 50.44 | 156 |
| 2003 | 51.14 | 152 |
| 2002 | 55.45 | 140 |
| 2001 | 58.6 | 128 |
| 2000 | 53.48 | 136 |
| 1999 | 47.67 | 140 |
| 1998 | 48.21 | 141 |
| 1997 | 42.42 | 152 |
| 1996 | 43.54 | 149 |
| 1995 | 45.64 | 142 |
| 1994 | 48.61 | 130 |
| 1993 | 54.6 | 104 |
| 1992 | 50.95 | 112 |
| 1991 | 60.92 | 83 |
| 1990 | 64.52 | 79 |
| 1989 | 60.88 | 75 |
| 1988 | 57.95 | 74 |
| 1987 | 62.34 | 62 |
| 1986 | 59.16 | 66 |