| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 0.968 | 113 |
| 2015 | 1.004 | 124 |
| 2014 | 1.555 | 120 |
| 2013 | 1.93 | 116 |
| 2012 | 1.994 | 124 |
| 2011 | 1.902 | 127 |
| 2010 | 1.828 | 123 |
| 2009 | 2.027 | 130 |
| 2008 | 3.827 | 108 |
| 2006 | 3.033 | 119 |
| 2005 | 2.713 | 119 |
| 2004 | 2.628 | 111 |
| 2003 | 3.438 | 100 |
| 2002 | 4.296 | 95 |
| 2001 | 4.842 | 96 |
| 2000 | 4.859 | 104 |
| 1999 | 4.66 | 110 |
| 1998 | 4.644 | 114 |
| 1997 | 4.563 | 115 |
| 1996 | 4.5 | 117 |
| 1995 | 4.5 | 116 |
| 1994 | 4.5 | 103 |
| 1993 | 4.5 | 101 |
| 1992 | 4.5 | 99 |
| 1991 | 4.5 | 103 |
| 1990 | 4.5 | 104 |
| 1989 | 4.5 | 102 |
| 1988 | 4.5 | 94 |
| 1987 | 4.5 | 93 |
| 1986 | 4.5 | 95 |