| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.758 | 117 |
| 2015 | 0.896 | 129 |
| 2014 | 1.146 | 130 |
| 2013 | 1.634 | 124 |
| 2012 | 2.25 | 119 |
| 2011 | 2.083 | 121 |
| 2010 | 1.458 | 137 |
| 2009 | 1.917 | 134 |
| 2008 | 3.667 | 118 |
| 2007 | 2.854 | 141 |
| 2006 | 2.438 | 144 |
| 2005 | 2.146 | 132 |
| 2004 | 2.25 | 120 |
| 2003 | 2.688 | 116 |
| 2002 | 3 | 114 |
| 2001 | 3 | 127 |
| 2000 | 2.625 | 137 |
| 1999 | 2.688 | 134 |
| 1998 | 3.208 | 135 |
| 1997 | 3.5 | 131 |
| 1996 | 3.667 | 127 |
| 1995 | 4.5 | 115 |
| 1994 | 4.5 | 102 |
| 1993 | 4.5 | 102 |
| 1992 | 4.5 | 101 |
| 1991 | 4.5 | 104 |
| 1990 | 4.5 | 103 |
| 1989 | 4.5 | 103 |
| 1988 | 4.5 | 93 |
| 1987 | 4.5 | 92 |
| 1986 | 5 | 93 |