| 时间 | 值 （%） | 世界排名 |
|---|---|---|
| 2016 | 1.58 | 50 |
| 2015 | 0.59 | 162 |
| 2014 | 1.14 | 147 |
| 2013 | 1.23 | 141 |
| 2012 | 0.68 | 165 |
| 2011 | 0.38 | 172 |
| 2010 | 0.18 | 175 |
| 2009 | 0.84 | 153 |
| 2008 | 1.62 | 148 |
| 2007 | 0.61 | 174 |
| 2006 | 1.98 | 140 |
| 2005 | 0.28 | 170 |
| 2004 | 0.89 | 147 |
| 2003 | 0.7 | 150 |
| 2002 | 0.02 | 174 |
| 2001 | 0 | 167 |
| 2000 | -.01 | 165 |
| 1999 | 0.4 | 146 |
| 1997 | 0.69 | 131 |
| 1996 | 0.73 | 117 |
| 1995 | 0.77 | 105 |
| 1994 | 0.84 | 97 |
| 1993 | 0.9 | 86 |
| 1992 | 0.98 | 65 |
| 1991 | 1.08 | 64 |
| 1990 | 1.03 | 65 |
| 1989 | 0.95 | 59 |
| 1988 | 1.19 | 44 |
| 1987 | 1.04 | 47 |
| 1986 | 0.84 | 43 |