| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2015 | 1.73 | 125 |
| 2014 | 1.47 | 138 |
| 2013 | 1.74 | 126 |
| 2012 | 1.19 | 155 |
| 2011 | 0.98 | 157 |
| 2010 | 1.07 | 151 |
| 2009 | 0.88 | 151 |
| 2008 | 1.45 | 154 |
| 2007 | 0.82 | 171 |
| 2006 | 0.64 | 169 |
| 2005 | 1.1 | 152 |
| 2004 | 0.69 | 156 |
| 2003 | 0.45 | 163 |
| 2002 | 0.1 | 170 |
| 2001 | 0.15 | 157 |
| 2000 | 0.53 | 144 |
| 1999 | 0.35 | 147 |
| 1998 | 0.38 | 148 |
| 1997 | 0.29 | 155 |
| 1996 | 0.03 | 160 |
| 1995 | 0 | 159 |
| 1994 | 0.03 | 140 |
| 1993 | 0.04 | 136 |
| 1992 | 0.01 | 129 |
| 1991 | 0 | 132 |
| 1990 | 0.01 | 127 |
| 1989 | 0 | 119 |
| 1988 | 0.01 | 120 |
| 1987 | 0.01 | 116 |
| 1986 | 0.01 | 104 |