| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.52 | 63 |
| 2015 | 1.54 | 69 |
| 2014 | 1.63 | 67 |
| 2013 | 1.54 | 72 |
| 2012 | 1.43 | 74 |
| 2011 | 1.54 | 67 |
| 2010 | 1.56 | 67 |
| 2009 | 1.65 | 72 |
| 2008 | 1.6 | 73 |
| 2007 | 1.55 | 77 |
| 2006 | 1.75 | 67 |
| 2005 | 1.93 | 62 |
| 2004 | 1.79 | 72 |
| 2003 | 1.59 | 84 |
| 2002 | 1.45 | 92 |
| 2001 | 1.1 | 114 |
| 2000 | 0.96 | 118 |
| 1999 | 0.95 | 117 |
| 1998 | 0.93 | 117 |
| 1997 | 0.88 | 125 |
| 1996 | 0.9 | 122 |
| 1995 | 0.94 | 120 |
| 1994 | 0.97 | 120 |
| 1993 | 1.02 | 121 |
| 1992 | 1.05 | 110 |
| 1991 | 1.07 | 106 |
| 1990 | 1.08 | 106 |
| 1989 | 1.11 | 101 |
| 1988 | 1.08 | 103 |
| 1987 | 1.16 | 100 |
| 1986 | 1.18 | 93 |